(-4又7/8)-(-5又1/2)+(-4又1/4)-(+13又1/8)

问题描述:

(-4又7/8)-(-5又1/2)+(-4又1/4)-(+13又1/8)

(-4又7/8)-(-5又1/2)+(-4又1/4)-(+3又1/8)
=-4+5-4-3-7/8+1/2-1/4-1/8
=-6+1/2-1/4-(7/8+1/8)
=-7+1/4
=-(6又3/4)