题目内容
计算:
(1)(1-
)2-
+(
)0
(2)2
+3
÷
(3)(2+
)2008-(2-
)2009
(1)(1-
| 2 |
| 3 | ||
|
| 2 | ||
|
(2)2
| 48 |
| 27 |
| 6 |
(3)(2+
| 3 |
| 3 |
(1)原式=3-2
-3
+3+
+1=7-5
;
(2)原式=8
+9
÷
=8
+
;
(3)原式=[(2+
)(2-
)]2008×(2-
)=2-
.
| 2 |
| 2 |
| 3 |
| 2 |
(2)原式=8
| 3 |
| 3 |
| 6 |
| 3 |
9
| ||
| 2 |
(3)原式=[(2+
| 3 |
| 3 |
| 3 |
| 3 |
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