题目内容
计算:
(1)2
-3
+4
-
(2)2
•(3
-
)
(1)2
| 3 |
| 5 |
| 3 |
| 5 |
(2)2
| 6 |
| 2 |
|
(1)原式=2
+4
-3
-
=6
-4
;
(2)原式=2
×3
-2
×
=12
-2
=10
.
| 3 |
| 3 |
| 5 |
| 5 |
=6
| 3 |
| 5 |
(2)原式=2
| 6 |
| 2 |
| 6 |
|
=12
| 3 |
| 3 |
=10
| 3 |
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