题目内容
计算:
(1)
+
-
-6
(2)(2-
)(2+
)
(1)
| 2 | ||
|
| 27 |
| 18 |
|
(2)(2-
| 3 |
| 3 |
(1)原式=
+3
-3
-2
=
-2
;
(2)原式=22-(
)2
=4-3
=1.
| 2 |
| 3 |
| 2 |
| 3 |
=
| 3 |
| 2 |
(2)原式=22-(
| 3 |
=4-3
=1.
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| 2 | ||
|
| 27 |
| 18 |
|
| 3 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 2 |
| 3 |