题目内容
计算:
(1)
+2
-6
(2)(2
-1)2+(
-
)(
+
).
(1)
| 1 |
| 2 |
| 8 |
| 12 |
|
(2)(2
| 3 |
| 3 |
| 2 |
| 3 |
| 2 |
(1)原式=
+4
-3
=4
-2
;
(2)原式=12-4
+1+3-2=14-4
.
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
(2)原式=12-4
| 3 |
| 3 |
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| 2 |
| 8 |
| 12 |
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| 3 |
| 2 |
| 3 |
| 2 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
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