(-2/3)-(+1/3)等于多少是应该等于负的三分之一,还是应该等于负1,

问题描述:

(-2/3)-(+1/3)等于多少
是应该等于负的三分之一,还是应该等于负1,

--1

原式=-(2/3+1/3)
=-1
答:等于-1.
(不懂可追问,满意请采纳)谢谢!祝你学习进步!

(-2/3)-(+1/3)
=(-2/3)+(-1/3)
=-1

(-2/3)-(+1/3)
=(-2/3)-(1/3)
=-[(2/3)+(1/3)]
=-1