-4.27+3.8-(-1.2)+(-0.5)-(+0.73)是多少?
问题描述:
-4.27+3.8-(-1.2)+(-0.5)-(+0.73)是多少?
答
-4.27+3.8-(-1.2)+(-0.5)-(+0.73)
=-4.27+3.8+1.2-0.5-0.73
=-(4.27+0.5+0.73)+5
=-5.5+5
=-0.5