(-3又1/2)-(+5.75)+(+7又3/4)-(+12又1/4)+(-3.25)
问题描述:
(-3又1/2)-(+5.75)+(+7又3/4)-(+12又1/4)+(-3.25)
简便
答
原式
=(-3又1/2-12又1/4-3.25)+(7又3/4-5.75)
=(-19)+2
=-17