题目内容
计算
(1)
-
+
(2)
-
-
+
.
(1)
| 27 |
| 12 |
| 45 |
(2)
| 18 |
|
| ||||
|
(1-
|
(1)原式=3
-2
+3
=
+3
;
(2)原式=3
-
-(
÷
+
÷
)+|1-
|
=3
-
-1-
+
-1
=
-2.
| 3 |
| 3 |
| 5 |
| 3 |
| 5 |
(2)原式=3
| 2 |
3
| ||
| 2 |
| 3 |
| 3 |
| 6 |
| 3 |
| 2 |
=3
| 2 |
3
| ||
| 2 |
| 2 |
| 2 |
=
| 3 |
| 2 |
| 2 |
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