题目内容
1
×90+1
×26+1
.
| 7 |
| 13 |
| 7 |
| 13 |
| 7 |
| 13 |
1
×90+1
×26+1
=1
×(90+26+1),
=
×117,
=180.
| 7 |
| 13 |
| 7 |
| 13 |
| 7 |
| 13 |
=1
| 7 |
| 13 |
=
| 20 |
| 13 |
=180.
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题目内容
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