题目内容
15-3
÷
×1
.
| 7 |
| 9 |
| 中 |
| 7 |
| 1 |
| 7 |
15-3
÷
×1
,
=15-
×
×
,
=15-5
,
=9
.
| 7 |
| 9 |
| 6 |
| 7 |
| a |
| 7 |
=15-
| 3c |
| 9 |
| 7 |
| 6 |
| 9 |
| 7 |
=15-5
| a |
| 3 |
=9
| 1 |
| 3 |
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题目内容
| 7 |
| 9 |
| 中 |
| 7 |
| 1 |
| 7 |
| 7 |
| 9 |
| 6 |
| 7 |
| a |
| 7 |
| 3c |
| 9 |
| 7 |
| 6 |
| 9 |
| 7 |
| a |
| 3 |
| 1 |
| 3 |