题目内容
化简:
(1)2
+3
-
-
(2)
÷
×(-
),(a>0,b>0)
(1)2
| 12 |
1
|
5
|
2
| ||
| 3 |
(2)
| 2 |
| b |
| ab2 |
| 6a |
| b2 |
|
| 2 |
| 3 |
| a3b |
(1)原式=4
+
-
-
=
;
(2)∵a>0,b>0;
∴原式=
×
×(-
),
=-
×
×
=-
a2b2
.
| 3 |
6
| ||
| 3 |
4
| ||
| 3 |
8
| ||
| 3 |
6
| ||
| 3 |
(2)∵a>0,b>0;
∴原式=
| 2 |
| b |
| ab2 |
| b2 |
| 6a |
|
| 2 |
| 3 |
| a3b |
=-
| 2 |
| b |
| b2 |
| 6a |
| 2 |
| 3 |
ab2×
|
| 2 |
| 9 |
| a |
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