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