124×0.456-123×0.455怎样用简便算法

xiazier2022-10-04 11:39:541条回答

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远离烦恼共回答了18个问题 | 采纳率100%: 124×0.456-123×0.455
=(123+1)x0.456-123x0.455
=0.456+123x0.456-123x0.455
=0.456+123x(0.456-0.455)
=0.456+123x0.001
=0.456+0.123
=0.579; 1年前

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