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【321103】【课时练】第1单元 分数乘法 5 小数乘分数的计算方法-六年级上册数学一课一练(人教版

时间:2025-01-08 19:23:39 作者: 字数:3320字
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5 小数乘分数的计算方法

本课导学

本课知识点:掌握小数乘分数的计算方法,并能熟练计算。

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a>

特别提醒:分数与小数相乘,一般把小数化成分数后再计算;当分母和小数能被同一个数除尽时,也可以直接相乘。

【快乐训练营】

一、想一想,填一填。

1.1.6 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a>( )4 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a>( )

2.4.8千克的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a>( )3.6米的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a>( )

  1.  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 米=( )分米 

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 吨=( )千克   

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 时=( )

4.乙数是甲数的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ,已知甲数是2.5,甲数比乙数多( )

5.一块周长是 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 米的长方形木板,它的宽是0.2米,长是( )米,面积是( )平方米。

6.一条绳子长6.6米,截下全长的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ,还剩 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ,还剩( )米。

二、判断是非。(对的画“√”,错的画“×

1.一个小数乘分数,积一定小于这个小数。( )

2.1的倒数是10的倒数还是0( )

3.因为 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> × <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> × <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 1,所以 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 互为倒数。( )

4.4.5吨铁的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a>1.2吨棉花的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 一样重。( )

5.40.4kg <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a>10.1kg( )

三、在下面括号里填上适当的数。

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 小时=( )分  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> =( )厘米

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> =( )千克  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 千米 = ( )

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> = ( )( )

四、在○里填上“>”、“<”或“=”。

1.8× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ○1.8  2.8○2.8× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a>  

0.8× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ○0.6× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a>    <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a>

五、看谁算得又对又快。

2.5× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> =  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ×0.4=

2.4× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> = 9.6× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> =

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ×2.7= 5.5× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> =

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ×2.1= 3.2× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> =

【知识加油站】

六、列式计算。

1.1.5 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 是多少?



2.1.8kg <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 是多少千克?



3.2.8小时的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 是多少小时?


七、解决问题。

1.平行四边形的底是 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 米,高是0.75米。面积是多少平方米?





2.平行四边形的底是 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 米,高是底的0.75,高是多少米?





3.平行四边形的底是 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 米,高是底的0.75。面积是多少平方米?




4.一根绳子长4.5米,第一次用去 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ,第二次用去 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 米,问还剩下多少米?




5.一根绳子原长2.5米,先剪去 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ,再接上 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ,问这根绳子现在是多少米?




6.一块长方形的铁板长6米,宽是长的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 。这块铁板的面积是多少?周长是多少?







7.饭店买来面粉0.875吨,第一天用去这批面粉的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ,第二天又用去 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 吨,两天共用去面粉多少吨?






`

【我来纠错】





















参考答案

一、1. <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a>  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 2.0.6kg 3m

3.4.5 250 40

4.1

5.0.6 0.12

6.  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> 2.2

二、1. × 2. × 3. × 4. × 5.

三、25 35 160 1125 2 15

四、> < < >

五、2.1 0.375 1.8 8 1.05 7.7 1.5 1.2

六、1.1.5× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> =0.2

2.1.8× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> =0.9kg

3.2.8× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> = 1.6h

七、1.  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ×0.75 = <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> (㎡)

2.  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ×0.75= <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> m


3.  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ×0.75= <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> m <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> × <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> = <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> (㎡)

4. 4.5-4.5× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> + <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> =3.5m

5. 2.5×(1- <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> )+2.5×(1- <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> )× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> =2.4m

6. 6×( <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> )=12(㎡) ( 6+( <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> ))×2=16m


  1. 0.875× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> + <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/101/" title="小数" class="c1" target="_blank">小数</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> <a href="/tags/195/" title="乘法" class="c1" target="_blank">乘法</a> =0.375t


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