80.5÷1.25怎样简便计算
问题描述：
80.5÷1.25怎样简便计算
答
80.5÷1.25
=(80.5×0.8)÷(1.25×0.8)
=(80+0.5)×0.8÷1
=80×0.8+0.5×0.8
=64+0.4
=64.4