把(+5)+(-12)-(-8)-(+9)写成省略括号形式.
问题描述:
把(+5)+(-12)-(-8)-(+9)写成省略括号形式.
答
(+5)+(-12)-(-8)-(+9)
=5-12+8-9
答
5-12+8-9
答
(+5)+(-12)-(-8)-(+9)
=5-12+8-9
= -8