题目内容
计算
(1)2
+
-4
(2)5
+
-6
×
.
(1)2
| 2 |
| 18 |
| 8 |
(2)5
| 12 |
| 1 |
| 2 |
| 48 |
|
| 2 |
(1)2
+
-4
=2
+3
-8
=-3
;
(2)5
+
-6
×
=10
+2
-4
=8
.
| 2 |
| 18 |
| 8 |
=2
| 2 |
| 2 |
| 2 |
=-3
| 2 |
(2)5
| 12 |
| 1 |
| 2 |
| 48 |
|
| 2 |
=10
| 3 |
| 3 |
| 3 |
=8
| 3 |
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