简便运算：9.862.51.25-12.50.62518

分类: 作业答案 • 2021-12-19 10:43:58

问题描述：

简便运算：9.8*62.5*1.25-12.5*0.625*18

答

9.8*62.5*1.25-12.5*0.625*18
=9.8*62.5*1.25-1.25*62.5*1.8
=（9.8-1.8）*62.5*1.25
=8*1.25*62.5
=10*62.5
=625

答

9.8*62.5*1.25-12.5*0.625*18
=9.8*62.5*1.25-1.25*62.5*1.8
=62.5*1.25*（9.8-1.8）
=62.5*1.25*8
=62.5*10
=625

简便运算：9.8*62.5*1.25-12.5*0.625*18