B Set 30 Unknown

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                "type": "decimals",
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                "type": "decimals",
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                "id": 15,
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                "operand1": 40.4,
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                "operand1": 7.8,
                "operand2": 13.4,
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                "operand1": 42,
                "operand2": 6,
                "question": "42.0 ÷ 6 = ?",
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                "id": 19,
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                "subType": "divide",
                "operand1": 5,
                "operand2": 2,
                "question": "5.0 ÷ 2 = ?",
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                "id": 20,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 4.8,
                "operand2": 2.9,
                "question": "4.8 × 2.9 = ?",
                "answer": 13.92,
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