题目内容
计算
(1)
+
+
)2
(2)
-2
+|
-
|.
(1)
| 81 |
| 3 | -27 |
(-
|
(2)
| 2 |
| 3 |
| 2 |
| 3 |
(1)
+
+
,
=9-3+
,
=6
;
(2)
-2
+|
-
|,
=
-2
+
-
,
=-
.
| 81 |
| 3 | -27 |
(-
|
=9-3+
| 2 |
| 3 |
=6
| 2 |
| 3 |
(2)
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
| 3 |
| 2 |
=-
| 3 |
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