B Set 72 Unknown

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                "question": "1.1 × 9 = ?",
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                "id": 3,
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                "question": "15.6 + 9.0 = ?",
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                "correctAnswer": "24.6",
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                "type": "decimals",
                "subType": "add",
                "operand1": 5.3,
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                "question": "5.3 + 4.2 = ?",
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                "id": 5,
                "type": "decimals",
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                "operand1": 18.2,
                "operand2": 0.3,
                "question": "18.2 × 0.3 = ?",
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                "id": 6,
                "type": "decimals",
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                "question": "0.9 + 9.7 = ?",
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                "question": "11.7 + 12.4 = ?",
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                "question": "18.7 - 14.4 = ?",
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                "id": 10,
                "type": "decimals",
                "subType": "divide",
                "operand1": 28.8,
                "operand2": 2,
                "question": "28.8 ÷ 2 = ?",
                "answer": 14.4,
                "correctAnswer": "14.4",
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                "id": 11,
                "type": "decimals",
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                "question": "18.3 + 1.2 = ?",
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                "id": 12,
                "type": "decimals",
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                "operand2": 6,
                "question": "19.2 ÷ 6 = ?",
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                "id": 14,
                "type": "decimals",
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                "operand1": 6.5,
                "operand2": 4.1,
                "question": "6.5 + 4.1 = ?",
                "answer": 10.6,
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                "id": 15,
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                "question": "4.8 - 4.3 = ?",
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                "id": 16,
                "type": "decimals",
                "subType": "add",
                "operand1": 13.6,
                "operand2": 13.8,
                "question": "13.6 + 13.8 = ?",
                "answer": 27.4,
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                "id": 17,
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                "operand2": 0.2,
                "question": "1.0 - 0.2 = ?",
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                "operand2": 15.3,
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                "answer": 19.9,
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                "id": 19,
                "type": "decimals",
                "subType": "divide",
                "operand1": 51.2,
                "operand2": 4,
                "question": "51.2 ÷ 4 = ?",
                "answer": 12.8,
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                "id": 20,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 18.7,
                "operand2": 6.4,
                "question": "18.7 - 6.4 = ?",
                "answer": 12.3,
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