18.6×0.75-0.75×8.6用简便方法计算
问题描述:
18.6×0.75-0.75×8.6用简便方法计算
答
18.6×0.75-0.75×8.6
=0.75×(18.6-8.6)
=0.75×10
=7.5
这个把0.75提出来就很简单了.祝学习进步!