题目内容
计算下列各题
(1)2
-6
+3
;
(2)(
-1)2-(
-
)(
+
).
(1)2
| 12 |
|
| 48 |
(2)(
| 3 |
| 3 |
| 2 |
| 3 |
| 2 |
(1)原式=4
-2
+12
=14
.
(2)原式=3-2
+1-3+2
=3-2
.
| 3 |
| 3 |
| 3 |
=14
| 3 |
(2)原式=3-2
| 3 |
=3-2
| 3 |
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题目内容
| 12 |
|
| 48 |
| 3 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 3 |
| 3 |
| 3 |
| 3 |