A-A+

计算:(1)9+(-1.4)-(6)-(-125);(2)(-12)×(34+56-1);(

2022-08-15 16:21:07 问答库 阅读 207 次

问题详情

计算:
(1)9+(-1.4)-(6)-(-12

5

);
(2)(-12)×(3

4

+5

6

-1);
(3)(-1

2

)×5+(-5)×(-1

4

)+5×(-3

4

);
(4)5+36÷(-3)2×(-1

2

)-(-1)2013

参考答案

(1)原式=9-1.4-6+125
=9-6+125-1.4
=3;

(2)原式=(-12)×34+(-12)×56-(-12)×1
=-9-10+12
=-19+12
=-7;

(3)原式=(-5)×(12-14+34)
=(-5)×1
=-5;

(4)原式=5+36÷9×(-12)-(-1)
=5+4×(-12)+1
=5-2+1
=4.

考点: