题目内容
计算:
(1)
+
-
;
(2)
;
(3)3(
+
)+3(
-2
).
(1)
3 | 8 |
0 |
|
(2)
| ||||
|
(3)3(
2 |
3 |
2 |
3 |
(1)原式=2+0-
=
;
(2)原式=
-
=4-2
=2;
(3)原式=3
+3
+3
-6
=6
-3
.
1 |
2 |
=
3 |
2 |
(2)原式=
16 |
4 |
=4-2
=2;
(3)原式=3
2 |
3 |
2 |
3 |
=6
2 |
3 |
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