题目内容
计算:
(1)3
+
-2
-2
(2)
-
(3)
+(
+1)-1+(-2)-2
(4)
+
-(
-1)0.
(1)3
| 3 |
| 2 |
| 2 |
| 3 |
(2)
| 2 | ||
2-
|
| 12 |
(3)
| 18 |
| 2 |
(4)
| 2 | ||
|
| 27 |
| 3 |
(1)原式=
-
;
(2)原式=2(2+
)-2
=4;
(3)原式=3
+
-1+
=4
-
;
(4)原式=
+1+3
-1=4
.
| 3 |
| 2 |
(2)原式=2(2+
| 3 |
| 3 |
(3)原式=3
| 2 |
| 2 |
| 1 |
| 4 |
| 2 |
| 3 |
| 4 |
(4)原式=
| 3 |
| 3 |
| 3 |
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