计算下面各题,
问题描述:
计算下面各题,
(1)(-5)+3+(+5)+(-2)
(2)(-3又2分之1)+(+7分之6)+(-0.5)+(+1又7分之1)
答
(1)(-5)+3+(+5)+(-2)
=(-5+5)+(3-2)
=0+1
=1
(2)(-3又2分之1)+(+7分之6)+(-0.5)+(+1又7分之1)
=(-3又1/2-0.5)+(6/7+1又1/7)
=-4+2
=-2