题目内容
(1)
-
+
(2)
-
+
(3)
-
(4)
-5
(5)(2
+3
)(2
-3
).
| 18 |
| 72 |
| 50 |
(2)
| 27 |
|
| 12 |
(3)
| 3 | 27 |
| ||||
|
(4)
| ||||
|
(5)(2
| 3 |
| 2 |
| 3 |
| 2 |
(1)原式=3
-6
+5
=2
;
(2)原式=3
-
+2
=
;
(3)原式=3-2=1
(4)原式=3
-5;
(5)原式=12-18=-6.
| 2 |
| 2 |
| 2 |
| 2 |
(2)原式=3
| 3 |
| ||
| 3 |
| 3 |
| 14 |
| 3 |
| 3 |
(3)原式=3-2=1
(4)原式=3
| 2 |
(5)原式=12-18=-6.
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