题目内容
计算:
(1)5
÷(
+
);
(2)
;
(3)
+
.
(1)5
| 15 |
| ||
| 3 |
| ||
| 3 |
(2)
2
| ||||||
|
(3)
9-4
|
9+4
|
(1)原式=5
÷
=5
×
=
=
;
(2)原式=
=
+
-
;
(3)原式=
+
=|2-
|+|2+
|=
-2+2+
=2
.
| 15 |
| ||||
| 3 |
| 15 |
| 3 | ||||
|
15
| ||||||
| 2 |
75
| ||||
| 2 |
(2)原式=
2
| ||||||||
5+2
|
| 2 |
| 3 |
| 5 |
(3)原式=
(2-
|
(2+
|
| 5 |
| 5 |
| 5 |
| 5 |
| 5 |
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