35乘0.3乘四十二分之三十五 {简便运算}

分类: 作业答案 • 2021-12-20 01:41:31

问题描述：

答

35×0.3×35/42=35×3/10×35/42
用35和10约分=7×3/2×35/42
用7和42约分=1×3/2×35/6
用3和6约分=1/2×35/2=35/4

答

35乘0.3乘四十二分之三十五
=35x(3/10x5/6)
=35x1/4
=35/4