题目内容
计算下列各题(要求写出解题关键步骤):
(1)3-2×(-5)2;
(2)-22-(-3)3×(-1)4-(-1)5;
(3)[(-
)3×(-
)2÷(-
)-32-(-3)3]×(-14);
(4)
.
(1)3-2×(-5)2;
(2)-22-(-3)3×(-1)4-(-1)5;
(3)[(-
| 3 |
| 2 |
| 4 |
| 3 |
| 1 |
| 2 |
(4)
(-2)3×(-1)5-13÷[-(
| ||
| 0.125×8+[1-32×(-2)] |
(1)原式=3-2×25
=3-50
=-47;
(2)原式=-4-(-27)-(-1)
=-4+27+1
=24;
(3)原式=[-
×
×(-2)-9-(-27)]×(-1)
=(12-9+27)×(-1)
=-30;
(4)原式=[-8×(-1)-13÷(-
)]÷{1+[1-9×(-2)}
=(8+52)÷(1+1+18)
=3.
=3-50
=-47;
(2)原式=-4-(-27)-(-1)
=-4+27+1
=24;
(3)原式=[-
| 27 |
| 8 |
| 16 |
| 9 |
=(12-9+27)×(-1)
=-30;
(4)原式=[-8×(-1)-13÷(-
| 1 |
| 4 |
=(8+52)÷(1+1+18)
=3.
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