用简便方法计算17.5+6.35+42.5+3.65*6+60
问题描述:
用简便方法计算17.5+6.35+42.5+3.65*6+60
答
17.5+6.35+42.5+3.65*6+60
=17.5+42.5+60+6.35+3.65×6
=120+6.35+21.9
=148.25