题目内容
(1)
-
+
(2)
+
(3)
-2
(4)
(5)(
+
)(
-
)-
.
| 18 |
| 72 |
| 50 |
(2)
| 12 |
| 3 | 27 |
(3)
| ||||
|
(4)
| ||||
|
(5)(
| 7 |
| 3 |
| 7 |
| 3 |
| 16 |
(1)原式=3
-6
+5
=2
;
(2)原式=2
+3;
(3)原式=
+1-2
=2+1-2
=1;
(4)原式=
=
;
(5)原式=7-3-4
=0.
| 2 |
| 2 |
| 2 |
=2
| 2 |
(2)原式=2
| 3 |
(3)原式=
| 4 |
=2+1-2
=1;
(4)原式=
| ||
|
=
| 3 |
(5)原式=7-3-4
=0.
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