题目内容
计算:(1)
×
-
×
(2)(
-1)2-2
(
-1).
| 12 |
| ||
| 3 |
| 2 |
| 8 |
(2)(
| 2 |
| 2 |
| 2 |
(1)原式=2
×
-
×2
=2-4
=-2;
(2)原式=2-2
+1-2
×
+2
=2-2
+1-4+2
=-1.
| 3 |
| ||
| 3 |
| 2 |
| 2 |
=2-4
=-2;
(2)原式=2-2
| 2 |
| 2 |
| 2 |
| 2 |
=2-2
| 2 |
| 2 |
=-1.
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