12.5x0.38+1.25x4.2+0.125x20如何用简便方法计算

蠢猪猪2022-10-04 11:39:541条回答

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sunbiggest 共回答了18个问题 | 采纳率94.4%
12.5x0.38+1.25x4.2+0.125x20
=12.5×0.38+12.5×0.42+12.5×0.2
=12.5×(0.38+0.42+0.2)
=12.5×1
=12.5
1年前

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如何用简单方法计算12.5x0.38+1.25x4.2+0.125x20
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liubaifeng123 共回答了21个问题 | 采纳率95.2%
原式=0.125x38+0.125x42+0.125x20=0.125x(38+42+20)=0.125x100=12.5