(7+19/25)*0.4+(7+19/25)*60%-0.4除3/5 简算

问题描述:

(7+19/25)*0.4+(7+19/25)*60%-0.4除3/5 简算

(7+19/25)*0.4+(7+19/25)*60%-0.4/3
=(7+19/25)*0.4+(7+19/25)*(1-0.4)-0.4/3 0.4=40%
=7+19/25-2/15
=7+(57-6)/75
=7又17/25