题目内容
[1÷(
+
)]×
.
| 3 |
| 4 |
| 1 |
| 3 |
| 3 |
| 4 |
[1÷(
+
)]×
=[1÷
]×
=[1×
]×
=
×
=
.
| 3 |
| 4 |
| 1 |
| 3 |
| 3 |
| 4 |
=[1÷
| 13 |
| 12 |
| 3 |
| 4 |
=[1×
| 12 |
| 13 |
| 3 |
| 4 |
=
| 12 |
| 13 |
| 3 |
| 4 |
=
| 9 |
| 13 |
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