题目内容
计算:
(1)
+
(
-
)+
;
(2)
-(
)-1+
(
-1)-20080-|
-2|.
(1)
2 | ||
|
3 |
3 |
6 |
8 |
(2)
12 |
| ||
3 |
3 |
3 |
3 |
(1)原式=
+3-3
+2
=3;
(2)原式=2
-
+3-
-1+
-2
=
.
2 |
2 |
2 |
=3;
(2)原式=2
3 |
3 |
3 |
3 |
=
3 |
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2 | ||
|
3 |
3 |
6 |
8 |
12 |
| ||
3 |
3 |
3 |
3 |
2 |
2 |
2 |
3 |
3 |
3 |
3 |
3 |