| 3 / 9 + ________ = 8 / 9 |
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| 4 / 10 + ________ = 9 / 10 |
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| 3 / 11 + _________ = 7 / 11 |
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| _________ + 5 /11 = 10 / 11 |
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| _________ + 3 / 11 = 10 / 11 |
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| 4 / 11 + __________ = 9 / 11 |
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| 12 / 15 - __________ = 4 / 15 |
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| __________ - 3 / 10 = 4 / 10 |
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| _________ - 8 / 15 = 3 / 15 |
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| ________ - 10 / 15 = 3 / 15 |
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| 13 / 15 - _________ = 7 / 15 |
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| 13 / 15 - _________ = 9 / 15 |
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| 9 / 10 - _________ = 1 / 10 |
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| _______ - 6 / 10 = 3 / 10 |
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| 11 / 16 - _______ = 3 / 16 |
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| 14 / 16 - _______ = 5 / 16 |
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| _______ - 8 / 16 = 4 / 16 |
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| _______ - 7 / 16 = 6 / 16 |
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| 15 / 16 - ________ = 1 / 16 |
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| 15 / 16 - _______ = 8 / 16 |
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