B Set 48 Unknown

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                "operand2": 18.6,
                "question": "1.0 + 18.6 = ?",
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                "correctAnswer": "19.6",
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                "id": 2,
                "type": "decimals",
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                "operand2": 1.1,
                "question": "19.9 × 1.1 = ?",
                "answer": 21.89,
                "correctAnswer": "21.89",
                "difficulty": "normal"
            },
            {
                "id": 3,
                "type": "decimals",
                "subType": "add",
                "operand1": 12.1,
                "operand2": 19.9,
                "question": "12.1 + 19.9 = ?",
                "answer": 32,
                "correctAnswer": "32",
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                "id": 4,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 2.3,
                "operand2": 1.5,
                "question": "2.3 - 1.5 = ?",
                "answer": 0.8,
                "correctAnswer": "0.8",
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            },
            {
                "id": 5,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 9.7,
                "operand2": 0.5,
                "question": "9.7 - 0.5 = ?",
                "answer": 9.2,
                "correctAnswer": "9.2",
                "difficulty": "normal"
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            {
                "id": 6,
                "type": "decimals",
                "subType": "divide",
                "operand1": 100.1,
                "operand2": 7,
                "question": "100.1 ÷ 7 = ?",
                "answer": 14.3,
                "correctAnswer": "14.3",
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                "id": 7,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 9.7,
                "operand2": 3.9,
                "question": "9.7 × 3.9 = ?",
                "answer": 37.83,
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                "id": 8,
                "type": "decimals",
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                "operand1": 17.4,
                "operand2": 12.8,
                "question": "17.4 - 12.8 = ?",
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                "id": 9,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 13.5,
                "operand2": 5.5,
                "question": "13.5 × 5.5 = ?",
                "answer": 74.25,
                "correctAnswer": "74.25",
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                "id": 10,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 8.1,
                "operand2": 5.8,
                "question": "8.1 - 5.8 = ?",
                "answer": 2.3,
                "correctAnswer": "2.3",
                "difficulty": "normal"
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            {
                "id": 11,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 12,
                "operand2": 0.8,
                "question": "12 × 0.8 = ?",
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                "id": 12,
                "type": "decimals",
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                "operand1": 4.4,
                "operand2": 2.7,
                "question": "4.4 × 2.7 = ?",
                "answer": 11.88,
                "correctAnswer": "11.88",
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                "id": 13,
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                "subType": "divide",
                "operand1": 78.4,
                "operand2": 7,
                "question": "78.4 ÷ 7 = ?",
                "answer": 11.2,
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                "id": 14,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 10.7,
                "operand2": 9.3,
                "question": "10.7 × 9.3 = ?",
                "answer": 99.51,
                "correctAnswer": "99.51",
                "difficulty": "normal"
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                "id": 15,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 9.2,
                "operand2": 5.1,
                "question": "9.2 × 5.1 = ?",
                "answer": 46.92,
                "correctAnswer": "46.92",
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                "id": 16,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 2.2,
                "operand2": 0.3,
                "question": "2.2 - 0.3 = ?",
                "answer": 1.9,
                "correctAnswer": "1.9",
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                "id": 17,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 0.2,
                "operand2": 0.2,
                "question": "0.2 - 0.2 = ?",
                "answer": 0,
                "correctAnswer": "0",
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                "id": 18,
                "type": "decimals",
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                "operand1": 13.5,
                "operand2": 9.4,
                "question": "13.5 × 9.4 = ?",
                "answer": 126.9,
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                "id": 19,
                "type": "decimals",
                "subType": "add",
                "operand1": 16.1,
                "operand2": 7.4,
                "question": "16.1 + 7.4 = ?",
                "answer": 23.5,
                "correctAnswer": "23.5",
                "difficulty": "normal"
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            {
                "id": 20,
                "type": "decimals",
                "subType": "divide",
                "operand1": 78,
                "operand2": 6,
                "question": "78.0 ÷ 6 = ?",
                "answer": 13,
                "correctAnswer": "13",
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