题目内容
计算:
(1)
-
+
;
(2)(
-
)×
.
(1)
| 27 |
| 12 |
|
(2)(
| 48 |
| 75 |
1
|
(1)原式=3
-2
+
=
;
(2)原式=(4
-5
)×
=-
×
=-2.
| 3 |
| 3 |
| ||
| 3 |
=
4
| ||
| 3 |
(2)原式=(4
| 3 |
| 3 |
2
| ||
| 3 |
=-
| 3 |
2
| ||
| 3 |
=-2.
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题目内容
| 27 |
| 12 |
|
| 48 |
| 75 |
1
|
| 3 |
| 3 |
| ||
| 3 |
4
| ||
| 3 |
| 3 |
| 3 |
2
| ||
| 3 |
| 3 |
2
| ||
| 3 |