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【321102】【课时练】第1单元 分数乘法 4 分数乘分数的简便运算-六年级上册数学一课一练(人教版

时间:2025-01-08 19:23:46 作者: 字数:4068字
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4 分数乘分数的简便运算

本课导学

本课知识点:理解分数乘分数简便运算的方法。

 <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a>

特别提醒:在分数乘法运算中,凡是分子和分母(无论是否是同一个分数),只要有公因数,就可以约分。先约分再计算会使计算更加简便。

【快乐训练营】

一、想一想,填一填。

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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> 表示( );

 <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> 表示( );

2.分数乘分数,应该 ( )乘( ),( )乘( ),能约分的可以( )再乘。

3.一根木棒长 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 米,它的 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 是( )米。

4.一个长方形的宽是 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 米,长是宽的2倍,这个长方形的面积是( )平方米。

二、画一画,算一算。













 <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> =(    )

三、判断是非。(对的打√,错的打×

1.1吨的 <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/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/432/" title="简便" class="c1" target="_blank">简便</a>2吨的 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 同样重。 ( )

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/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/432/" title="简便" class="c1" target="_blank">简便</a> ×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/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/432/" title="简便" class="c1" target="_blank">简便</a> ( )

3.一个数乘假分数,积一定大于这个数。 ( )

4.一根长12米的钢管,截去了 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> ,就是短了 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 米。 (

四、口算。

× ×4

27×  <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/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/432/" title="简便" class="c1" target="_blank">简便</a> ×56

15× <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a>

五、看谁算得又对又快。

 <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a>

六、在○里填上“>”、“<”或“=”。

 <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> ×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/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/432/" title="简便" class="c1" target="_blank">简便</a>

24× <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 24  <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a>

【知识加油站】

七、想一想,算一算。

×××…××



八、列式计算。

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/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/432/" title="简便" class="c1" target="_blank">简便</a> 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/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/432/" title="简便" class="c1" target="_blank">简便</a> 是多少千克?



2.24 <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> 是多少?




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/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/432/" title="简便" class="c1" target="_blank">简便</a> 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/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/432/" title="简便" class="c1" target="_blank">简便</a> 是多少小时?  



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/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/432/" title="简便" class="c1" target="_blank">简便</a> 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/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/432/" title="简便" class="c1" target="_blank">简便</a> 是多少米?



  1. 解决问题。

1.要修一条长 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 千米的公路,第一天修了全长 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> ,第一天修了多少千米?





2.一张纸的面积是 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 平方米,它的 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 有多少平方米?





3.一台磨面机,每小时磨面粉 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 吨, <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 小时磨面粉多少吨? <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 小时磨面粉多少吨?



4. 一个正方形的边长是 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> m,它的周长和面积各是多少?




5. 挖一条长 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 千米的水渠,第一天挖了全长的 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> ,第一天挖了多少千米?还剩多少千米没挖?




6.一个果园占地20公顷,其中的 种苹果树,种梨树,苹果树和梨树各种了多少公顷?





7.小冬看一本96页的故事书,第一天看了全书的 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> ,第二天看了第一天的 <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/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/432/" title="简便" class="c1" target="_blank">简便</a> 。第二天看了多少页?第三天小冬应从第几页看起?



`

【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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> 是多少  <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> 是多少

2. 分子 分子 分母 分母 先

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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a>

二、画图略  <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a>

三、1.√ 2.× 3.√ 4.×

四、 <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> 15 49  <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a>

五、 <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a>

六、< > < > > <

七、 <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/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/432/" title="简便" class="c1" target="_blank">简便</a>


八、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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> (千克)

2.24× <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> =2

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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> (小时)  

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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> (米)

九、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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> km

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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> (㎡)

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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> t <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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> t

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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> (㎡)

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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</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/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/432/" title="简便" class="c1" target="_blank">简便</a> m

  1. 20× =8(公顷) 20×=5(公顷)

7.96× <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/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/432/" title="简便" class="c1" target="_blank">简便</a> =12(页) 12× <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/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/432/" title="简便" class="c1" target="_blank">简便</a> =8(页) 12+8=20(页) 第三天应该从21页开始




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