题目内容
计算:
(1)-12÷
×(-3)2;
(2)(-2)÷[(-
)2×(
)3]×|-
|-(-5).
(1)-12÷
| 1 |
| 9 |
(2)(-2)÷[(-
| 1 |
| 2 |
| 1 |
| 2 |
| 25 |
| 4 |
(1)-12÷
×(-3)2
=-1×9×9
=-81;
(2)(-2)÷[(-
)2×(
)3]×|-
|-(-5)
=(-2)÷[
×
]×
+5
=(-2)×32×
+5
=-400+5
=-395.
| 1 |
| 9 |
=-1×9×9
=-81;
(2)(-2)÷[(-
| 1 |
| 2 |
| 1 |
| 2 |
| 25 |
| 4 |
=(-2)÷[
| 1 |
| 4 |
| 1 |
| 8 |
| 25 |
| 4 |
=(-2)×32×
| 25 |
| 4 |
=-400+5
=-395.
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