题目内容
计算:
(1)2
+3
-
(2)
+3
-
+
.
(1)2
| 3 |
| 12 |
| 48 |
(2)
| 8 |
|
| 1 | ||
|
| ||
| 2 |
(1)原式=2
+6
-4
=4
;
(2)原式=2
+3×
-
+
=2
+
-
+
=
+
.
| 3 |
| 3 |
| 3 |
| 3 |
(2)原式=2
| 2 |
| ||
| 3 |
| ||
| 2 |
| ||
| 2 |
| 2 |
| 3 |
| ||
| 2 |
| ||
| 2 |
3
| ||
| 2 |
3
| ||
| 2 |
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