(-42)-(28)-(-12)-(7)等于多少?

2024-12-25 18:24:17
推荐回答(2个)
回答1:

(-42)-(28)-(-12)-(7)
=-42-28+12-7
=-(42+28+7)+12
=-77+12
=-(77-12)
=-65
负负得正,负正得负。

回答2:

(-42)-(28)-(-12)-(7)
=-42-28+12-7
=-70+12-7
=-58-7
=-65