B Set 56 Unknown

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                "id": 5,
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                "question": "11.4 ÷ 6 = ?",
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                "type": "decimals",
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                "question": "15.5 - 10.5 = ?",
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                "operand1": 1.4,
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                "question": "1.4 × 1.1 = ?",
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                "id": 15,
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                "operand1": 16.2,
                "operand2": 9,
                "question": "16.2 ÷ 9 = ?",
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                "operand1": 18.3,
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                "question": "18.3 - 4.6 = ?",
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                "id": 17,
                "type": "decimals",
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                "operand1": 78.6,
                "operand2": 6,
                "question": "78.6 ÷ 6 = ?",
                "answer": 13.1,
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                "operand1": 3.9,
                "operand2": 15.8,
                "question": "3.9 + 15.8 = ?",
                "answer": 19.7,
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                "id": 20,
                "type": "decimals",
                "subType": "add",
                "operand1": 0.1,
                "operand2": 5,
                "question": "0.1 + 5.0 = ?",
                "answer": 5.1,
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