11+(-18)-12+19简算

11+(-18)-12+19简算
2024-11-15 06:16:40
推荐回答(4个)
回答1:

遇到加减,可以直接去掉括号
所以
11+(-18)-12+19
=11-18-12+19
=(11+19)-(18+12)
=30-30
=0

回答2:

11+(-18)-12+19
=11-18-12+19
=(11+19)-(18+12)
=30-30
=0

回答3:

11-18-12+19
=-7-12+19
=-19+19
=0

回答4:

先11+19=30,再–18–12=-30。30-30=0