问题 填空题
直接填出结果:
(1)(-14)+(+20)=______;
(2)-12-8=______;
(3)100+(-100)=______;
(4)0+(-6)=______.
(5)-(
1
2
)
3
=______
(6)(-0.625)×(-1.6)=______
(7)(+4)×(-5)=______
(8)(-3.25)×(+
2
13
)=______
(9)0.25×(-2.15)+0.75×(-2.15)=______;
(10)(-4)×(-124)×(-0.25)=______.
答案

(1)(-14)+(+20)=6;

(2)-12-8=-20;

(3)100+(-100)=0;

(4)0+(-6)=-6.

(5)-(

1
2
)3=-
1
8

(6)(-0.625)×(-1.6)=1

(7)(+4)×(-5)=-20

(8)(-3.25)×(+

2
13
)=-
1
2

(9)0.25×(-2.15)+0.75×(-2.15)=-2.15;

(10)(-4)×(-124)×(-0.25)=-124.

故答案为:(1)6;(2)-20;(3)0;(4)-6;(5)-

1
8
;(6)1;(7)-20;(8)-
1
2
;(9)-2.15;(10)-124.

单项选择题
单项选择题