B Set 30 Unknown

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                "type": "decimals",
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                "operand2": 4,
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                "operand1": 18.9,
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                "question": "17.9 - 1.1 = ?",
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                "id": 20,
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                "subType": "divide",
                "operand1": 38.7,
                "operand2": 9,
                "question": "38.7 ÷ 9 = ?",
                "answer": 4.3,
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