题目内容
计算:
(1)
(
+
)-
(
)-
;
(2)(
+
)÷
.
(1)
| 1 |
| 2 |
| 3 |
| 2 |
| 3 |
| 4 |
| 2 |
| 27 |
(2)(
| 48 |
| 1 |
| 4 |
| 6 |
| 27 |
(1)原式=
+
-
-3
=
+
-3
=
-
=-
-
;
(2)原式=(4
+
)÷3
=
+
=
+
.
| ||
| 2 |
| ||
| 2 |
3
| ||
| 4 |
| 3 |
=
| ||
| 2 |
2
| ||||
| 4 |
| 3 |
=
| ||||
| 2 |
| ||
| 4 |
=-
| 5 |
| 2 |
| 3 |
| 1 |
| 4 |
| 2 |
(2)原式=(4
| 3 |
| 1 |
| 4 |
| 6 |
| 3 |
=
4
| ||
3
|
| ||||
3
|
=
| 4 |
| 3 |
| 1 |
| 12 |
| 2 |
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