(3.78+5又7分之2+1.22+1又7分之5)*(5又8分之3+1-1.375)

问题描述:

(3.78+5又7分之2+1.22+1又7分之5)*(5又8分之3+1-1.375)

(3.78+5又7分之2+1.22+1又7分之5)*(5又8分之3+1-1.375)
=[(3.78+1.22)+(5又7分之2+1又7分之5)]*(5.375-1.375+1)
=[5+7}*5
=12*5
=60