(1)(-28)÷(-6+4)+(-1)×5 (2)-14-[2-(-3)2]+(-1)4(3)8-23÷(-4)×(-7+5)(4...

2024-12-30 15:54:16
推荐回答(1个)
回答1:

(1)原式=14-5=9;
(2)原式=-1+7+1=7;
(3)原式=8-4=4;
(4)原式=(

1
2
-3+
5
6
-
7
12
)×(-36)=-18+108-30+21=81.