3.86+0.12×4.7的简便运算

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摘要 3.86+0.12×4.7=3.86+0.12x(5-0.3)=3.86+0.12x5-0.12x0.3=3.86+0.6-0.036=4.46-0.036=4.424

咨询记录 · 回答于2023-02-26

3.86+0.12×4.7的简便运算

3.86+0.12×4.7=3.86+0.12x(5-0.3)=3.86+0.12x5-0.12x0.3=3.86+0.6-0.036=4.46-0.036=4.424

或3.86+0.12×4.7=3.86+0.12x(4+0.7)=3.86+0.12x4+0.12x0.7=3.86+0.48+0.084=4.34+0.084=4.427

以上两种简便算法都可以

或3.86+0.12×4.7=3.86+0.12x(4+0.7)=3.86+0.12x4+0.12x0.7=3.86+0.48+0.084=4.34+0.084=4.424

总之正确答案是①3.86+0.12×4.7=3.86+0.12x(5-0.3)=3.86+0.12x5-0.12x0.3=3.86+0.6-0.036=4.46-0.036=4.424②或3.86+0.12×4.7=3.86+0.12x(4+0.7)=3.86+0.12x4+0.12x0.7=3.86+0.48+0.084=4.34+0.084=4.424以上两种简便算法都可以

最后一段是正确答案

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