(12.5+1.25)*0.8用简便方法计算怎么做
问题描述:
(12.5+1.25)*0.8用简便方法计算怎么做
答
(12.5+1.25)*0.8
=(12.5+1.25)*4*0.2
=(12.5*4+1.25*4)*0.2
=(50+5)*0.2
=11