题目内容
计算:(1)(-8)×
+8×(-
)(2)-23+(1+
)×
×(42-2).
| 3 |
| 7 |
| 5 |
| 7 |
| 3 |
| 7 |
| 1 |
| 5 |
(1)原式=-8×(
+
)
=-8×
=-
;
(2)原式=-8+
×
×(16-2)
=-8+
×14
=-8+4
=-4.
| 3 |
| 7 |
| 5 |
| 7 |
=-8×
| 8 |
| 7 |
=-
| 64 |
| 7 |
(2)原式=-8+
| 10 |
| 7 |
| 1 |
| 5 |
=-8+
| 2 |
| 7 |
=-8+4
=-4.
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