题目内容
计算
(1)
-
+
(2)(
+2
)÷
.
(1)
| 27 |
| 12 |
|
(2)(
| 15 |
|
| 3 |
(1)原式=3
-2
+
=
;
(2)原式=
+2
=
+2×
=
+
.
| 3 |
| 3 |
2
| ||
| 3 |
=
5
| ||
| 3 |
(2)原式=
| 15÷3 |
|
=
| 5 |
| ||
| 6 |
=
| 5 |
| ||
| 3 |
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题目内容
| 27 |
| 12 |
|
| 15 |
|
| 3 |
| 3 |
| 3 |
2
| ||
| 3 |
5
| ||
| 3 |
| 15÷3 |
|
| 5 |
| ||
| 6 |
| 5 |
| ||
| 3 |