A-A+

计算:(1)(-9)-(10)-(2)-(-8)(2)(-8.4)+112+(-25)+(-

2022-08-15 11:25:25 问答库 阅读 205 次

问题详情

计算:
(1)(-9)-(10)-(2)-(-8)
(2)(-8.4)+11

2

+(-2

5

)+(-0.3)+23

5


(3)(-5.3)+(-3.2)-(-2.5)-(4.8)
(4)12+(-3)-(15)-(-4)
(5)-1

3

+3

4

-5

6

-1

2


(6)(7

13

)+(17)+(-11

3

)-(7)-(-21

3

)+(-7

13

).

参考答案

(1)原式=-9-10-2+8=-21+8=-13;

(2)原式=-8.4+1.5-0.3+2.2=-8.7+3.5=-5.2;

(3)原式=-5.3-3.2+2.5-4.8=-13.3+2.5=-10.8;

(4)原式=12-3-15+4=-2;

(5)原式=-76+14=-1112;

(6)原式=(713-713)+(17+7)+(213-113)=0+24+1=25.

考点: