题目内容
计算
(1)(-2)3+(-3)×[-22-(-1)]
(2)(-125
)÷5.
(1)(-2)3+(-3)×[-22-(-1)]
(2)(-125
| 5 |
| 7 |
(1)原式=-8-3×(-4+1)
=-8-3×(-3)
=-8+9
=1;
(2)原式=(-125-
)×
=-125×
-
×
=-25-
=-25
.
=-8-3×(-3)
=-8+9
=1;
(2)原式=(-125-
| 5 |
| 7 |
| 1 |
| 5 |
=-125×
| 1 |
| 5 |
| 5 |
| 7 |
| 1 |
| 5 |
=-25-
| 1 |
| 7 |
=-25
| 1 |
| 7 |
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