有理数计算:(-20)-(+5)-(-5)-(-12)

问题描述:

有理数计算:(-20)-(+5)-(-5)-(-12)

-8

(-20)-(+5)-(-5)-(-12)
=-25+5+12
=-20+12
=-8

—8

-32

(-20)-(+5)-(-5)-(-12)
=-20-5+5+12
=12-20
=-8