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【320018】【期末题型专项】八大单元选择题50题 人教版(含答案)2

时间:2025-01-08 00:18:54 作者: 字数:16156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/205/" title="选择" class="c1" target="_blank">选择</a> 小学数学四年级上册期末黄金题型特训A卷—八大单元选择题50

一.选择题

1.下面数中, <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 的“8”表示8个千万。

A780430000 B860004020 C8400730

2.在下列各数中,数字6表示6个十万的是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A961542 B77610000 C6145830

363□ <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/205/" title="选择" class="c1" target="_blank">选择</a> 万,方框里最小填 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A6 B5 C4

420191023日,港珠澳大桥正式开通一周年。港珠澳大桥的海中桥隧主体工程为38540000000元,四舍五入到亿位约是(  )亿元。

A3854 B385 C386 D39

5.由100个万、1个千组成的数是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A100100 B1000100 C1001000

6.与539180最接近的近似数是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A54 B53 C50

7.在用计算器计算时,如果遇到要重复用一个数,可以按 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 键把这个数存起来。

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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

8.下面进率不是100的两个面积单位是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A.平方米和平方分米 B.平方米和公顷

C.公顷和平方千米 D.平方分米和平方厘米

9.把1公顷的土地平均分成4份,每份土地是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 平方米。

A2500 B250 C25

101平方米大约能放3张课桌,1平方千米能放 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 张课桌。

A300 B30000 C3000000

11.“9000平方米〇9公顷”,比较大小,在〇里应填的符号是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

12.飞机跑道的面积约 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A.平方米 B.公顷 C.平方千米

13.果园的占地面积是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A.平方千米 B.平方米 C.公顷

14.计算大面积土地时用 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 作单位.

A.平方米 B.平方千米 C.公顷

15.两个锐角的和一定是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A.锐角 B.直角 C.钝角 D.不能确定

16.老师在黑板上画一个 <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/205/" title="选择" class="c1" target="_blank">选择</a> 和同学们在纸上画一个 <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/205/" title="选择" class="c1" target="_blank">选择</a> 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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A.老师画的角大 B.一样大 C.没法比较

17.用一副三角板不能画出下面 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 度的角.

A105 B15 C20

18.把一条线段向一个方向无限延伸,得到一条 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A.线段 B.射线 C.直线

19.直线与射线比较, <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A.直线更长 B.射线更长 C.无法比较

20 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 的角叫锐角.

A.大于90 B.小于90

C.大于90度小于180

21.将库布齐沙漠变为绿洲是我们中国人创造的一个奇迹,这个绿化成果还荣获了联合国颁发的2015年度土地生命奖。下面图1是沙漠中的一块绿地,图2的箭头所指的部分表示的是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A.种植沙蒿的面积 B.种植沙打旺的面积

C.这块绿地的总面积 D.这块绿地的周长

22.“格子乘法”是15世纪中叶,意大利数学家帕乔利在《算术、几何及比例性质摘要》一书中介绍的一种两个数的相乘的计算方法。15世纪传入我国,明朝数学家程大位称此法为“铺地锦”。如今我们在列式计算 <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/205/" title="选择" class="c1" target="_blank">选择</a> 时需要2步乘法和1步加法,在第二步乘法时我们需要计算 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

23.学校准备给全校38个班每班配备1台饮水机,经商量,决定购买单价为289元的立式饮水机,学校一共需要准备 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 元。

A10982 B11200 C11600 D12000

24.食堂买了23桶油,每桶114元。用竖式计算一共需要多少元钱。如图竖式中箭头所指的这一步表示买 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 桶油的钱数。

 <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/205/" title="选择" class="c1" target="_blank">选择</a>

A114 B23 C20 D2

25.用竖式计算 <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/205/" title="选择" class="c1" target="_blank">选择</a> 时,45相乘实际是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

26.下面不是一对互相垂直的线段的是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A.书本的长与宽 B9时整,钟面上的时针与分针

C.红领巾上的两条短边

27.下面图形 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 是平行四边形。

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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

28.直线 <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/205/" title="选择" class="c1" target="_blank">选择</a> 平行于 <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/205/" title="选择" class="c1" target="_blank">选择</a> ,梯形有 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 个。

 <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/205/" title="选择" class="c1" target="_blank">选择</a>

A2 B3 C4

29.如果将一个长方形框架拉成一个平行四边形,则它的 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 不变。

A.周长 B.面积 C.高

30.下列说法中, <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 是错误的。

A.平行四边形两组对边分别平行

B.梯形只有一组对边平行

C.平行四边形与梯形都有无数条高

D.平行四边形具有稳定性

31.在两条平行线之间画3条垂直线段,其中第一条线段长5厘米,那么第二条线段的长度是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A5厘米 B6厘米 C7厘米

328×_____50,横线上最大填 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A5 B6 C7

33.下列算式中符合“同头无除商八九”的是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

34.在计算 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 时,把除数看作40来试商比较合适。

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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

35.有306个乒乓球把它们装到盒子里每个盒子装24个,至少需要 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 个盒子。

A12 B13 C14

36.每个篮球35元,体育老师带500元去采购篮球。竖式中虚线部分表示的是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A.买1个篮球需用35 B.买1个篮球需用350

C.买10个篮球需用35 D.买10个篮球需用350

37.武汉市全民进行新冠病毒核酸检测,共检测近900万人,花费约9亿元,平均每人的花费大约是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 元。

A10 B100 C1000 D10000

38.下面是四位同学语、数成绩总分的复式条形统计图。 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 的语文成绩最高。

 <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/205/" title="选择" class="c1" target="_blank">选择</a>

A.小明 B.小杰 C.佳佳 D.小丽

39.如图中纵轴一格代表 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A100 B20 C120

40.观察图,跳绳的有30人,跑步的大约有 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 人.

 <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/205/" title="选择" class="c1" target="_blank">选择</a>

A60 B90 C120 D160

41.如图是某一物体在不同时刻影子长度的统计图,下午一点半时这个物体影子长度大约是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 厘米.

 <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/205/" title="选择" class="c1" target="_blank">选择</a>

A80 B135 C160

42.在烤盘上烤面包时,一次只能烤两片,两面都要烤,每面需要烤2分钟。烤5片面包至少需要 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 分钟。

A16 B12 C8 D10

43.一个平底锅每次能煎4条鱼,两面都要煎,每面需要4分,李阿姨要煎6条鱼,至少需要 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 分。

A8 B12 C16

44.下面的选项中,你认为可以通过合理安排做到节省时间的事件是 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A.青青感冒了,准备冲感冒药。洗杯子1分钟,找药2分钟,拿杯放药倒水1分钟

B.丽丽用肥皂洗袜子2分钟,用水清洗2分钟,晾袜子1分钟

C.明明早晨起床后,刷牙洗脸3分钟,用微波炉热早饭4分钟,吃早饭5分钟

D.小明周末做家务,扫地3分钟,擦桌子2分钟,拖地4分钟

45.淘气早晨起床后需要完成以下事情:叠被子3分,刷牙洗脸8分,读语文书30分,吃早餐10分,收拾桌子5分,听童话故事30分。他至少需要 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 分做完这些事情。

A70 B86 C60

46.一个锅里每次只能烙2张饼,两面都要烙,每面需要5分,烙5张饼最少需要 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

A15 B20 C25

47.爷爷每天早上起床都要做一些事情,所需的时间如下:听收音20分钟,洗漱10分钟,吃早饭15分钟,做完这些事情至少需要 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 分钟。

A45 B30 C20 D25

48.四年级举行100米赛跑,(1)班的3位选手的成绩分别是 <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/205/" title="选择" class="c1" target="_blank">选择</a> 秒, <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/205/" title="选择" class="c1" target="_blank">选择</a> 秒, <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/205/" title="选择" class="c1" target="_blank">选择</a> 秒.(2)班的3位选手的成绩分别是甲:15秒,乙:18秒,丙:23秒.(1)班选手比赛顺序是 <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/205/" title="选择" class="c1" target="_blank">选择</a> ;如果采取三局两胜制,(2)班可选择 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 的比赛顺序才能获胜.

A.乙 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> B.乙 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> C.丙 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

49.四(1)班和四(2)班各选3名实力不同的选手参加跳棋比赛,32胜。按照 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 的出场顺序能使四(1)班获胜的可能性大。

 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

四(1)班 四(2)班

上——上

中——中

下——下

四(1)班 四(2)班

下——上

上——中

中——下

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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a>

50.四(1)班一组和二组进行跑步比赛,三局二胜制,下面是两个组参赛同学平时50米跑的成绩.一组要想获胜,应该按照 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 方案安排比赛顺序.

一组

阳阳8.7

乐乐9.6

奇奇9.8

二组

毛毛8.5

皮皮9.2

宁宁9.9

A.阳阳 <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/205/" title="选择" class="c1" target="_blank">选择</a> 毛毛 乐乐 <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/205/" title="选择" class="c1" target="_blank">选择</a> 皮皮 奇奇 <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/205/" title="选择" class="c1" target="_blank">选择</a> 宁宁

B.阳阳 <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/205/" title="选择" class="c1" target="_blank">选择</a> 宁宁 乐乐 <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/205/" title="选择" class="c1" target="_blank">选择</a> 毛毛 奇奇 <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/205/" title="选择" class="c1" target="_blank">选择</a> 皮皮

C.阳阳 <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/205/" title="选择" class="c1" target="_blank">选择</a> 皮皮 乐乐 <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/205/" title="选择" class="c1" target="_blank">选择</a> 毛毛 奇奇 <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/205/" title="选择" class="c1" target="_blank">选择</a> 皮皮

D.阳阳 <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/205/" title="选择" class="c1" target="_blank">选择</a> 皮皮 奇奇 <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/205/" title="选择" class="c1" target="_blank">选择</a> 毛毛 乐乐 <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/205/" title="选择" class="c1" target="_blank">选择</a> 宁宁

小学数学四年级上册期末黄金题型特训A卷—八大单元选择题50

参考答案

一.选择题

1解: <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/205/" title="选择" class="c1" target="_blank">选择</a> 是由7个亿,8个千万,4个十万,3个万组成的;

 <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/205/" title="选择" class="c1" target="_blank">选择</a> 是由8个亿,6个千万,4个千,2个十组成的;

 <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/205/" title="选择" class="c1" target="_blank">选择</a> 是由8个百万,4个十万,7个百,3个十组成的。

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/205/" title="选择" class="c1" target="_blank">选择</a> 选项符合题意。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

2解: <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/205/" title="选择" class="c1" target="_blank">选择</a> 961542中“6”表示6个万,不符合题意;

 <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/205/" title="选择" class="c1" target="_blank">选择</a> 77610000中“6”表示6个十万,符合题意;

 <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/205/" title="选择" class="c1" target="_blank">选择</a> 6145830中“6”表示6个百万,不符合题意;

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

3解:63□ <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/205/" title="选择" class="c1" target="_blank">选择</a> 万,显然是按“五入”法求的近似数,方框里最小填5

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

4.解:38540000000≈385亿。

答案:B

5解:由100个万、1个千组成的数是1001000

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

6解: <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/205/" title="选择" class="c1" target="_blank">选择</a>

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

7解:用计算器计算时,如果遇到要重复一个数,可以利用 <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/205/" title="选择" class="c1" target="_blank">选择</a> 键,把这个数存起来。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

8解:进率不是100的两个面积单位是平方米和公顷。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

9解:1公顷 <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/205/" title="选择" class="c1" target="_blank">选择</a> 平方米

 <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/205/" title="选择" class="c1" target="_blank">选择</a> (平方米)

答:每份土地是2500平方米。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

10解:1平方千米 <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/205/" title="选择" class="c1" target="_blank">选择</a> 平方米

 <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/205/" title="选择" class="c1" target="_blank">选择</a> (张 <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/205/" title="选择" class="c1" target="_blank">选择</a>

答:1平方千米能放3000000张课桌。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

11解:9000平方米 <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/205/" title="选择" class="c1" target="_blank">选择</a> 公顷

0.9公顷 <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/205/" title="选择" class="c1" target="_blank">选择</a> 公顷

9000平方米 <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/205/" title="选择" class="c1" target="_blank">选择</a> 公顷.

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

12解:飞机跑道的面积约20公顷.

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

13解:由分析可知:果园的占地面积是4公顷;

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

14解:在计算土地面积时,常用的单位有公顷和平方千米,则计算大面积土地时用平方千米作单位.

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

15解:当 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 时, <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/205/" title="选择" class="c1" target="_blank">选择</a> ,即两锐角的和为锐角;

 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 时, <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/205/" title="选择" class="c1" target="_blank">选择</a> ,即两锐角的和为直角;

 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 时, <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/205/" title="选择" class="c1" target="_blank">选择</a> ,即两锐角的和为钝角;

综上所述,两锐角的和可能是锐角,可能是直角,也可能是钝角.

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

16解:老师在黑板上画的50度的角只是角的两边比同学们在纸上画的50度的角的两边的长,但是角的大小和角的两边张开的大小程度有关,和角的两边的长短无关,所以两个50度的角一样大.

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

17解:由分析可知,不是 <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/205/" title="选择" class="c1" target="_blank">选择</a> 的整数倍的度数,就不能用一副三角板画出,三个选项中,只有 <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/205/" title="选择" class="c1" target="_blank">选择</a> 不是 <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/205/" title="选择" class="c1" target="_blank">选择</a> 的整数倍,因此不能用一副三角板画出 <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/205/" title="选择" class="c1" target="_blank">选择</a> 的角.

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

18解:由射线的含义可知:把线段的一端无限延长,就得到一条射线;

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

19解:因为直线没有端点,它向两方无限延伸,无法量得其长度;

射线只有一个端点,它向一方无限延伸,也无法量得其长度;

所以射线和直线无法比较长短.

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

20解:大于 <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/205/" title="选择" class="c1" target="_blank">选择</a> 小于 <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/205/" title="选择" class="c1" target="_blank">选择</a> 的角,叫做锐角;

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

21 <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/205/" title="选择" class="c1" target="_blank">选择</a>

22解: <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/205/" title="选择" class="c1" target="_blank">选择</a> 在竖式计算中,十位上的2435,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/205/" title="选择" class="c1" target="_blank">选择</a>

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

23解: <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/205/" title="选择" class="c1" target="_blank">选择</a> (元 <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/205/" title="选择" class="c1" target="_blank">选择</a>

答:学校一共需要准备10982元。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

24解:114乘十位上的2228个十,也就是2280,表示买20桶油所花的钱数;

所以如图竖式中箭头所指的这一步表示买20桶油的钱数。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

25解:4964在百位上,表示4个百,575在十位上,表示5个十;

所以45相乘实际是4个百乘5个十,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/205/" title="选择" class="c1" target="_blank">选择</a>

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

26解:根据分析可得,红领巾上的两条短边不互相垂直,不是一对互相垂直的线段的是红领巾上的两条短边。所以选择 <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/205/" title="选择" class="c1" target="_blank">选择</a>

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

27解:根据平行四边形的特征可知:平行四边形是有两组对边分别平行的四边形,所以选项 <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/205/" title="选择" class="c1" target="_blank">选择</a> 中的图形是平行四边形。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

28解:图中的梯形有4个。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

29解:如果将一个长方形框架拉成一个平行四边形,则它的周长不变。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

30解:平行四边形两组对边分别平行,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/205/" title="选择" class="c1" target="_blank">选择</a> 不符合题意。

梯形是指一组对边平行而另一组对边不平行的四边形,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/205/" title="选择" class="c1" target="_blank">选择</a> 不符合题意。

平行四边形与梯形都有无数条高,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/205/" title="选择" class="c1" target="_blank">选择</a> 不符合题意。

平行四边形具有不稳定性,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/205/" title="选择" class="c1" target="_blank">选择</a> 符合题意。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

31解:两条直线都垂直于同一条直线,那么这两条直线互相平行;平行线之间的距离都相等,所以第二条线段的长度是5厘米。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

32解: <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/205/" title="选择" class="c1" target="_blank">选择</a>

答:横线上最大填6

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

33解: <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> ,不符合题意;

 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> ,不符合题意;

 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> ,不符合题意;

 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> ,符合题意;

所以符合“同头无除商八九”的是选项 <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/205/" title="选择" class="c1" target="_blank">选择</a>

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

34解:计算 <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/205/" title="选择" class="c1" target="_blank">选择</a> 时,42与整十数40最接近,所以用竖式计算试商时,我们一般把42看作40来试商;

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

35解: <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/205/" title="选择" class="c1" target="_blank">选择</a> (个 <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/205/" title="选择" class="c1" target="_blank">选择</a> (个 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> (个 <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/205/" title="选择" class="c1" target="_blank">选择</a>

答:至少需要13个盒子。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

36解:根据分析可得:

每个篮球35元,体育老师带500元去采购篮球。竖式中虚线部分表示的是:买10个篮球需用350元。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

37解:900 <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/205/" title="选择" class="c1" target="_blank">选择</a>

9亿 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> (元 <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/205/" title="选择" class="c1" target="_blank">选择</a>

答:平均每人的花费大约是100元。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

38解: <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/205/" title="选择" class="c1" target="_blank">选择</a>

所以佳佳的语文成绩最高。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

39解: <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/205/" title="选择" class="c1" target="_blank">选择</a> (箱 <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/205/" title="选择" class="c1" target="_blank">选择</a>

答:图中纵轴一格代表20箱。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

40 <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/205/" title="选择" class="c1" target="_blank">选择</a>

41解: <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> (厘米),

120厘米接近135厘米,

答:下午一点半时这个物体影子长度大约是135厘米.

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

42解: <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> (分钟)

答:烤5片面包至少需要10分钟。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

43解:给6条鱼编上号,123456

先煎1234的第一面需要4分钟;

然后把12翻面,拿出34放入564分钟后12完成拿出,放入34的反面,56翻面;

4钟后3456完成拿出;

共需要 <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/205/" title="选择" class="c1" target="_blank">选择</a> (分钟)

答:李阿姨要煎6条鱼,至少需要12分。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

44解: <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/205/" title="选择" class="c1" target="_blank">选择</a> 洗杯子1分钟,找药2分钟,拿杯放药倒水1分钟,都是单独完成的事,不能同时完成,所以不能通过合理安排做到节省时间;

 <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/205/" title="选择" class="c1" target="_blank">选择</a> 用肥皂洗袜子2分钟,用水清洗2分钟,晾袜子1分钟,都是单独完成的事,不能同时完成,所以不能通过合理安排做到节省时间;

 <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/205/" title="选择" class="c1" target="_blank">选择</a> 在用微波炉热早饭的同时可以刷牙洗脸,所以能通过合理安排做到节省时间;

 <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/205/" title="选择" class="c1" target="_blank">选择</a> 扫地3分钟,擦桌子2分钟,拖地4分钟,都是单独完成的事,不能同时完成,所以不能通过合理安排做到节省时间。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

45解:起床童话开始听故事,听童话故事的同时可以叠被子、刷牙洗脸和吃早餐、收拾桌子,听完童话故事读语文书30分钟。

总共需要: <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/205/" title="选择" class="c1" target="_blank">选择</a> (分钟),

答:最少需要60分钟。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

46解:根据分析可得,

 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> (分钟)

答:烙5张饼最少需要25分钟。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

47解:洗漱10分,吃早饭15分,同时可以听收音20分钟,一共需要:

 <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/205/" title="选择" class="c1" target="_blank">选择</a> (分钟)

答:做完这些事情至少需要25分钟。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

48解:根据题干分析可得:


四(1)班派出选手

四(2)班派出选手

获胜班级

第一组

 <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/205/" title="选择" class="c1" target="_blank">选择</a>

四(1

第二组

 <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/205/" title="选择" class="c1" target="_blank">选择</a>

四(2

第三组

 <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/205/" title="选择" class="c1" target="_blank">选择</a>

四(2

1)班选手比赛顺序是 <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/205/" title="选择" class="c1" target="_blank">选择</a> ;如果采取三局两胜制,(2)班可选择丙 <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/205/" title="选择" class="c1" target="_blank">选择</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/205/" title="选择" class="c1" target="_blank">选择</a> 乙的比赛顺序才能获胜.

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

49解:因为四(1)班和四(2)班的3名选手实力各不同

所以:四(1)班下 <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/205/" title="选择" class="c1" target="_blank">选择</a> 四(2)班上,四(1)班输

四(1)班上 <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/205/" title="选择" class="c1" target="_blank">选择</a> 四(2)班中,四(1)班胜

四(1)班中 <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/205/" title="选择" class="c1" target="_blank">选择</a> 四(2)班下,四(1)班胜

按照 <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/205/" title="选择" class="c1" target="_blank">选择</a> 的出场顺序能使四(1)班获胜的可能性大。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

50解:第一组要想获胜,应该按照:阳阳 <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/205/" title="选择" class="c1" target="_blank">选择</a> 宁宁 乐乐 <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/205/" title="选择" class="c1" target="_blank">选择</a> 毛毛 奇奇 <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/205/" title="选择" class="c1" target="_blank">选择</a> 皮皮。

一组21负获得胜利。

答案: <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/205/" title="选择" class="c1" target="_blank">选择</a>

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