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计算(1)-12×4-(-6)×5;(2)4-(-2)3-32÷(-1)3;(3)-24+3

2022-08-15 16:28:16 问答库 阅读 207 次

问题详情

计算
(1)-12×4-(-6)×5;
(2)4-(-2)3-32÷(-1)3
(3)-24+3×(-1)4-(-2)3
(4)(-1

2

+2

3

-1

4

)×(-24);
(5)(-47

8

)-(-51

2

)+(-41

4

)-(31

8

);
(6)3

2

×[3÷(-2

3

)2-14];
(7)-14-1

6

×[2-(-3)2];
(8)0.25×(-2)3-[4÷(-2

3

)2+1]+(-1)2007.

参考答案

(1)原式=-48-(-30)
=-48+30
=-18;

(2)原式=4-(-8)-9÷(-1)
=4+8+9
=21;

(3)原式=-16+3×1-(-8)
=-16+3+8
=-5;

(4)原式=-12×(-24)+23×(-24)-14×(-24)
=12-16+6
=2;

(5)原式=-478-318+512-414
=-8+114
=-634;

(6)原式=32×[3×94-1]
=32×234
=698;
(7)原式=-1-16×[2-9]
=-1-16×[-7]
=-1+76
=16;

(8)原式=0.25×(-8)-[4×94+1]-1
=-2-[9+1]-1
=-2-10-1
=-13.

考点: