0.5+(-4又1/4)-(+2.75)-(-6又1/2) 我要算式啊

问题描述:

0.5+(-4又1/4)-(+2.75)-(-6又1/2) 我要算式啊

0.5+(-4又1/4)-(+2.75)-(-6又1/2)
=0.5+6又1/2-(4又1/4+2.75)
=7-7
=0