简便计算4.25×0.75+75%+4.75+0.75

分类: 作业答案 • 2021-12-31 12:16:46

问题描述：

答

4.25×0.75+75%+4.75+0.75
=4.25×0.75+0.75×1+4.75+0.75
=4.25×0.75+1×0.75+4.75+0.75
=0.75×（4.25+1+4.75）
=0.75×10
=7.5