B Set 1 Unknown

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                "question": "21 + 876 = ___",
                "answer": 897
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                "question": "346 + 120 = ___",
                "answer": 466
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                "id": 5,
                "operand1": 1,
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                "operator": "+",
                "question": "1 + 45 = ___",
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