科目：初中數學 來源： 題型：
| 1 |
| 1×2 |
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| 2×3 |
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| 3×4 |
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| 9×10 |
| 1 |
| 1 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 9 |
| 1 |
| 10 |
| 1 |
| 1 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
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| 1 |
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| 1 |
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| 1 |
| 9 |
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| 1 |
| 10 |
| 9 |
| 10 |
| 1 |
| 1×3 |
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| 3×5 |
| 1 |
| 5×7 |
| 1 |
| 19×21 |
| 1 |
| 1×4 |
| 1 |
| 4×7 |
| 1 |
| 7×10 |
| 1 |
| (3n-2)(3n+1) |
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