B Set 21 Unknown

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                "operand2": 5,
                "question": "11.3 + 5.0 = ?",
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                "id": 3,
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                "question": "19.9 - 8.4 = ?",
                "answer": 11.5,
                "correctAnswer": "11.5",
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                "id": 4,
                "type": "decimals",
                "subType": "multiply",
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                "operand2": 5.2,
                "question": "11.9 × 5.2 = ?",
                "answer": 61.88,
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                "id": 5,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 0.6,
                "operand2": 0.2,
                "question": "0.6 - 0.2 = ?",
                "answer": 0.4,
                "correctAnswer": "0.4",
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                "id": 6,
                "type": "decimals",
                "subType": "add",
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                "question": "6.8 + 8.1 = ?",
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                "id": 7,
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                "operand1": 0.1,
                "operand2": 9.6,
                "question": "0.1 × 9.6 = ?",
                "answer": 0.96,
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                "id": 8,
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                "subType": "divide",
                "operand1": 137.9,
                "operand2": 7,
                "question": "137.9 ÷ 7 = ?",
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                "id": 9,
                "type": "decimals",
                "subType": "divide",
                "operand1": 148,
                "operand2": 10,
                "question": "148.0 ÷ 10 = ?",
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                "id": 10,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 10.4,
                "operand2": 7.3,
                "question": "10.4 × 7.3 = ?",
                "answer": 75.92,
                "correctAnswer": "75.92",
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                "id": 11,
                "type": "decimals",
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                "operand2": 2,
                "question": "17.6 ÷ 2 = ?",
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                "id": 12,
                "type": "decimals",
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                "id": 13,
                "type": "decimals",
                "subType": "divide",
                "operand1": 25.2,
                "operand2": 2,
                "question": "25.2 ÷ 2 = ?",
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                "id": 14,
                "type": "decimals",
                "subType": "divide",
                "operand1": 35.2,
                "operand2": 4,
                "question": "35.2 ÷ 4 = ?",
                "answer": 8.8,
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                "id": 15,
                "type": "decimals",
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                "operand1": 7.3,
                "operand2": 6.5,
                "question": "7.3 + 6.5 = ?",
                "answer": 13.8,
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                "id": 16,
                "type": "decimals",
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                "operand1": 13.6,
                "operand2": 9.9,
                "question": "13.6 - 9.9 = ?",
                "answer": 3.7,
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                "id": 17,
                "type": "decimals",
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                "operand1": 12.4,
                "operand2": 8.2,
                "question": "12.4 - 8.2 = ?",
                "answer": 4.2,
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                "id": 18,
                "type": "decimals",
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                "operand1": 17.9,
                "operand2": 3.7,
                "question": "17.9 × 3.7 = ?",
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                "id": 19,
                "type": "decimals",
                "subType": "add",
                "operand1": 8.5,
                "operand2": 17.6,
                "question": "8.5 + 17.6 = ?",
                "answer": 26.1,
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                "id": 20,
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                "subType": "multiply",
                "operand1": 19.4,
                "operand2": 1.5,
                "question": "19.4 × 1.5 = ?",
                "answer": 29.1,
                "correctAnswer": "29.1",
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