(-9)+4+(-5)+8怎么做

2025-06-26 21:25:27
推荐回答(5个)
回答1:

括号前有加号,去掉括号不变号
括号前有减号,去掉括号相反
(-9)+4+(-5)+8
=-9+4-5+8=-2

回答2:

(-9)+4+(-5)+8=-9+4-5+8=-2

回答3:

(-9)+4+(-5)+8=4-9-5+8=-2

回答4:

=-5-5+8
=-10+8
=-2

回答5:

=8-9+4-5
=-1-1
=-2