计算:(1)-23+(58)-(-5);(2)-1.2×4÷(-135);(3)-8÷49×(-23)2;(4)(-15)-18÷(-3

2025-06-28 22:42:23
推荐回答(1个)
回答1:

(1)原式=-23+(58+5)=-23+63=40;
(2)原式=-

6
5
×4×(-
5
8
)=3;
(3)原式=-8×
9
4
×
4
9
=-8;
(4)原式=-15+6+5=-4;
(5)原式=9+4-18=-5;
(6)原式=-1-
1
2
×
1
3
×(-7)=-1+
7
6
=
1
6