Subtraction Special Types Missing Subtrahend — Set 35

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                "question": "13 - 12 = ___",
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                "operand1": 91,
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                "id": 11,
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                "operand1": 35,
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                "question": "35 - 34 = ___",
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                "operand2": 43,
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                "question": "98 - 43 = ___",
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                "operand1": 77,
                "operand2": 31,
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                "question": "77 - 31 = ___",
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                "operand1": 54,
                "operand2": 32,
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                "question": "54 - 32 = ___",
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