B Set 60 Unknown

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                "id": 3,
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                "subType": "divide",
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                "operand2": 3,
                "question": "21.9 ÷ 3 = ?",
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                "type": "decimals",
                "subType": "add",
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                "id": 5,
                "type": "decimals",
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                "id": 6,
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                "question": "7.5 × 1 = ?",
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                "operand2": 19.1,
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                "id": 10,
                "type": "decimals",
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                "question": "21.6 ÷ 8 = ?",
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                "id": 12,
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                "operand2": 8.1,
                "question": "18.8 × 8.1 = ?",
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                "id": 13,
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                "operand1": 64.2,
                "operand2": 6,
                "question": "64.2 ÷ 6 = ?",
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                "id": 14,
                "type": "decimals",
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                "operand1": 4.9,
                "operand2": 3.3,
                "question": "4.9 + 3.3 = ?",
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                "id": 15,
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                "operand2": 6.4,
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                "type": "decimals",
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                "operand1": 6.6,
                "operand2": 18.4,
                "question": "6.6 + 18.4 = ?",
                "answer": 25,
                "correctAnswer": "25",
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                "id": 17,
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                "operand1": 33,
                "operand2": 5,
                "question": "33.0 ÷ 5 = ?",
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                "id": 18,
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                "operand1": 2.8,
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                "question": "2.8 + 7.9 = ?",
                "answer": 10.7,
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                "id": 20,
                "type": "decimals",
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                "operand1": 9.8,
                "operand2": 2.4,
                "question": "9.8 - 2.4 = ?",
                "answer": 7.4,
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