题目内容
| 计算： （
| 12÷[（
|
（1）（
+
）÷（
-
）
=
÷
=3
；
（d）1d÷[（
-
）×
]
=1d÷[
×
]
=1d÷
=1d0．
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| d |
| 1 |
| 3 |
=
| 7 |
| 1d |
| 1 |
| 6 |
=3
| 1 |
| d |
（d）1d÷[（
| 7 |
| 得 |
| d |
| 3 |
| 得 |
| 10 |
=1d÷[
| 1 |
| 得 |
| 得 |
| 10 |
=1d÷
| 1 |
| 10 |
=1d0．
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