题目内容
(1)
+|1-
|-
-
+
(2)-
+|1-
|+
+
.
| 9 |
| 2 |
| 3 | -8 |
| 2 |
| (-3)2 |
(2)-
| 3 | -1 |
| 3 |
| 3 | -
| ||
| (-2)2 |
(1)原式=3+
-1+2-
+3
=7;
(2)原式=-1+
-1-
+2
=
-
.
| 2 |
| 2 |
=7;
(2)原式=-1+
| 3 |
| 1 |
| 4 |
=
| 3 |
| 1 |
| 4 |
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