-1.53×0.75+2.53×3/4-0.2×7.5简便怎么算教我下?

分类: 作业答案 • 2021-12-30 12:43:59

问题描述：

答

-1.53×0.75+2.53×3/4-0.2×7.5
=-1.53×0.75+2.53×0.75-2×0.75
=0.75×(-1.53+2.53-2)
=0.75×(-1)
=-0.75