题目内容
计算:
(1)
+
-(
-
).
(2)
.
(1)
12 |
20 |
5 |
3 |
(2)
| ||||||||
(
|
(1)原式=2
+2
-
+
=3
+
;
(2)原式=
=1+
.
3 |
5 |
5 |
3 |
=3
3 |
5 |
(2)原式=
2+2
| ||
7-5 |
=1+
2 |
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题目内容
12 |
20 |
5 |
3 |
| ||||||||
(
|
3 |
5 |
5 |
3 |
3 |
5 |
2+2
| ||
7-5 |
2 |