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3.7×87×72.2简便方法

没有简便方法: 3.7×87×72.2 =321.9×72.2 =23241.18

87×0.38-8.7+72×0.87 =87x(0.38-0.1+0.72) =87x1 =...

它e×61=5小它1e小×16=454小5-1.它=1.491小÷9=1小1…5

72x(13+87)+28x(13+87) =72x100+28x100 =7200+2800 ...

每个都按100 差多少减多少 写的例子如100-2+(100-3)..... 然后100乘以个数...

简便计算 3.7×6.4+4.6×3.7-3.7 =3.7×(6.4+4.6-1) =3.7...

12.6+4.5÷3-12.7 =12.6+1.5-12.7 =14.1-12.7 =1.6...

72÷7=10…287÷3=2984÷6=14验算:80÷3=26…263÷5=12…396÷7=1...

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