(+3又2/5)+(-2又7/8)-(-5又3/5)-(+1/8)
问题描述:
(+3又2/5)+(-2又7/8)-(-5又3/5)-(+1/8)
答
(+3又2/5)+(-2又7/8)-(-5又3/5)-(+1/8)
=3又2/5+5又3/5-(2又7/8+1/8)
=9-3
=6