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【320926】五年级数学下册第四单元分数的意义和性质检测卷(拓展卷)(含答案)人教版

时间:2025-01-08 18:57:56 作者: 字数:10280字
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 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> Shape1

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密★启用前

2021-2022学年

五年级数学下册第四单元分数的意义和性质检测卷(拓展卷)


考试时间:80分钟;满分:102


班级: 姓名: 成绩:

注意事项:

1.答题前填写好自己的班级、姓名等信息。

2.请将答案正确填写在答题区域,注意书写工整。


卷面(2分)。我能做到书写端正,格式正确,卷面整洁。


一、认真填一填。(每空1分,共33分)

1.涂色部分占整个图形的几分之几?

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>                   

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

2.直线上点A用小数表示是(       ),用分数表示是(       ),减去2 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 是最小的质数。

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

3 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

4.填一填。(每题中前后两组中间填的分数不相同)

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>         <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>         <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

5.已知a2×3×7b2×5×7ab的最小公倍数是( ),最大公因数是( )

6.把一根24厘米长的绳子对折一次再对折一次,如果这时从中间剪开,那么较长的一段占全长的( ),是( )厘米。[来源:..]

7.芳芳和华华各有一些笔,若芳芳将自己笔的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 给华华后,华华又将现有笔的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 给芳芳,这时两人笔的支数相等。原来,芳芳笔的支数是华华的( )

8.一盒糖少于100块,22块地数或33块地数都正好数完,并且没有剩余,这盒糖最多有( )块。

9.一种地砖长4dm,宽3dm。如果用这种地砖铺一个正方形(用地砖必须是整块),正方形的边长最小是( )dm;在正方形的面积不超 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 1公顷时,正方形的边长最大是( )dm

10.两个数的最大公因数是6,它们的最小公倍数是24,这两个数的积是( )

11.插一排红旗共26面,原来每两面之间的距离是4米,现在改为5米。如果起点一面不移动,还可以有( )不移动.

12.一个自然数除以83,除以72,这个自然数最小是( )。

13.找规律,在横线里填适当的数。

1 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> ( ) <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

2 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> ( ) <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

二、仔细判一判。(对的画√,错的画X,每题1分,共5分)

1 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 三个分数中,最接近 1 的分数是 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> ( )

2 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 是非0自然数,如果 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 是假分数, <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 是真分数,则 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 等于7( )

3.两个整数的最大公因数和最小公倍数的积,等于这两个数之积。 ( )

4.甲数比乙数多4倍,那么乙数是甲数的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> ( )

5abc3个不同的非零自然数,且abc,那么 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> ( )

三、用心选一选。(将正确的选项填在括号内,每题1分,共5分)[来源:,,Z,X,X,K]

1.如图,甲、乙两条彩带都被遮住了一部分,两条彩带的长度相比(       )。

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

A.甲比乙长 B.乙比甲长 C.一样长 D.无法比较

2.一个最简真分数,分子与分母的和是12,这样的分数有(       )个。

A1 B2 C3 D4

3.甲乙两根丝带一样长,甲减去它的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> ,乙减去它的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 米,剩下的丝带(       )。

A.同样长 B.第二段长 C.第一段长 D.无法确定

4.有一个分数化成最简分数是 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> ,原分数的分子扩大为原来的4倍后是96,那么原分数的分母是(  )。

A26 B52 C65 D78

5.六(1)班人数的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 调入六(2)班后,两个班人数相等。原来六(1)班人数是六(2)班的几分之几?(       )。

A <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> B <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> C <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> D <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

四、细心算一算。(共20分)

1( <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 本题6)把下列的假分数化成带分数或整数。

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> =              <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> =              <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> =             

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> =              <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> =              <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> =            

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> =              <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> =        <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>       <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

2(本题6)约分。

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>               <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>               <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

3(本题8)将下面各组分数通分。

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>       <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>       <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>       <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>



五、解决问题。(共37分)

1(本题6)张明在比较分数大小的时发现这样一条规律:一个真分数的分子和分母加上相同的数(0除外),这个新分数大于原来的真分数。你认为这条规律对吗?

1 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>         <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>         <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

你的例子:(       )……

2)思考: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 比,(       )更接近1;(       )和(       )比,(       )更接近1

3)你的结论:(       )。

4)联想:假分数符合这个规律吗?有理有据的思考并简要写出你的推导过程。




2(本题6)一个分数的分母比它的分子大11,如果它的分母是它分子的3.75倍,那么这个分数等于多少?





3(本题6)已知 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> ,那么xyz的大小关系怎样?请按照从大到小的顺序排列,并写出判断的过程。[来源:学科网ZXXK]





4(本题6)一些贝壳,44个地数,最后多1个;55个地数,最后多2个;77个地数,最后少3个。这些贝壳至少有多少个?





5(本题6)根据图中信息解决问题。

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>





6(本题7)一块长方形地,长是100米,宽是80米,计划在这块地的边上种植一些杉 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 树,要求在四个顶点处各植一棵,并且每相邻两棵树的间距相等,每两棵树间的距离最多是多少米?最少需要多少棵杉树?











 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>




























[来源:§§]

答案解析部分

一、认真填一填。

1 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

22.42 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 5

【解析】

1A点是2往右2个小单位,1个小单位是0.220.20.4,所以A点用小数表示是2.4

22.42 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 2 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

32 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 2 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 厘面有2 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

361031521

【解析】

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

即: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

4 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> (答案不唯一)

5.     210     14

【解析】

a2×3×7b <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 2×5×7

ab的最小公倍数是 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 3×5×7210

它们的最大公因数是2×714

6.      <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>      6

【解析】

把一根24厘米长的绳子对折一次再对折一次,如果这时从中间剪开,那么较长的一段占全 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 长的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> ,是6厘米长。 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

7 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

【解析】

根据分析,

4×21

81

5÷7

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

原来,芳芳笔的支数是华华的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

896

【解析】

2×36(块)

6×1696(块)

9.     12     996

【解析】

最小是3×412dm

最大是1000÷12≈833×4×83996dm

10144

115[来源:学科网ZXXK]

1251

7×8-(23

565

51

13.      <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>       <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>





二、仔细判一判。

1×

2×

3.√

4.√

5×

三、用心选一选。

1A

2B

3D

4D

5A

四、细心算一算。

15 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 1370

2 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 5

3.① <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

五、解决问题。

1

这条规律对。

1 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>         <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>         <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

我的例子: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

2)思考: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 比, <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 更接近1 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 比, <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 更接近1

3)结论:真分数越接近1,这个真分数越大。

4)假分数 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 不符合这个规律。

思考: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 比, <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> ,所以 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 更接近1,假分数越接近1,这个假分数越小。

2

11÷3.751

11÷2.75

4

41115

答:这个分数等于 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

3

1)假设和均为1 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

2 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

4

4×5×73

1403

137(个)

答:这些贝壳至少有137个。


5

3的倍数有:36912161821……

2的倍数有:24 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 68101214161820……

第二个分数的分母比第一个分数的分母大4,找出12416

第一个分数是: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 第二个分数是: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

12315

16115

原分数就是: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a>

6

1002×2×5×5

802×2×2×2×5

所以10080的最大公因数是2×2×520,即每两棵树 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/385/" title="意义" class="c1" target="_blank">意义</a> <a href="/tags/386/" title="性质" class="c1" target="_blank">性质</a> 间的距离最多是20米。

10080×2÷20

360÷20

18(棵)

答:每两棵树间的距离最多是20米,最少需要18棵杉树。


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