B Set 6 Unknown

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                "operand2": 6.2,
                "question": "10.2 - 6.2 = ?",
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                "correctAnswer": "4",
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            {
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                "type": "decimals",
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                "operand2": 18.4,
                "question": "14.3 + 18.4 = ?",
                "answer": 32.7,
                "correctAnswer": "32.7",
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            },
            {
                "id": 3,
                "type": "decimals",
                "subType": "add",
                "operand1": 7.4,
                "operand2": 17.2,
                "question": "7.4 + 17.2 = ?",
                "answer": 24.6,
                "correctAnswer": "24.6",
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            },
            {
                "id": 4,
                "type": "decimals",
                "subType": "add",
                "operand1": 4.7,
                "operand2": 18.9,
                "question": "4.7 + 18.9 = ?",
                "answer": 23.6,
                "correctAnswer": "23.6",
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            },
            {
                "id": 5,
                "type": "decimals",
                "subType": "divide",
                "operand1": 118.8,
                "operand2": 9,
                "question": "118.8 ÷ 9 = ?",
                "answer": 13.2,
                "correctAnswer": "13.2",
                "difficulty": "normal"
            },
            {
                "id": 6,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 10,
                "operand2": 5.8,
                "question": "10 × 5.8 = ?",
                "answer": 58,
                "correctAnswer": "58",
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                "id": 7,
                "type": "decimals",
                "subType": "add",
                "operand1": 14.4,
                "operand2": 19.7,
                "question": "14.4 + 19.7 = ?",
                "answer": 34.1,
                "correctAnswer": "34.1",
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                "id": 8,
                "type": "decimals",
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                "id": 9,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 17.9,
                "operand2": 1.8,
                "question": "17.9 × 1.8 = ?",
                "answer": 32.22,
                "correctAnswer": "32.22",
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                "id": 10,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 7.8,
                "operand2": 6.4,
                "question": "7.8 - 6.4 = ?",
                "answer": 1.4,
                "correctAnswer": "1.4",
                "difficulty": "normal"
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                "id": 11,
                "type": "decimals",
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                "operand1": 6.5,
                "operand2": 4.8,
                "question": "6.5 - 4.8 = ?",
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                "id": 12,
                "type": "decimals",
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                "operand1": 1.1,
                "operand2": 0.7,
                "question": "1.1 × 0.7 = ?",
                "answer": 0.77,
                "correctAnswer": "0.77",
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                "id": 13,
                "type": "decimals",
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                "operand1": 14.3,
                "operand2": 6,
                "question": "14.3 × 6 = ?",
                "answer": 85.8,
                "correctAnswer": "85.8",
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                "id": 14,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 8.1,
                "operand2": 8.7,
                "question": "8.1 × 8.7 = ?",
                "answer": 70.47,
                "correctAnswer": "70.47",
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            {
                "id": 15,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 9.9,
                "operand2": 4.8,
                "question": "9.9 - 4.8 = ?",
                "answer": 5.1,
                "correctAnswer": "5.1",
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            {
                "id": 16,
                "type": "decimals",
                "subType": "add",
                "operand1": 17.7,
                "operand2": 8,
                "question": "17.7 + 8.0 = ?",
                "answer": 25.7,
                "correctAnswer": "25.7",
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                "id": 17,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 2.9,
                "operand2": 7.7,
                "question": "2.9 × 7.7 = ?",
                "answer": 22.33,
                "correctAnswer": "22.33",
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                "id": 18,
                "type": "decimals",
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                "operand1": 8,
                "operand2": 1.9,
                "question": "8 × 1.9 = ?",
                "answer": 15.2,
                "correctAnswer": "15.2",
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            {
                "id": 19,
                "type": "decimals",
                "subType": "divide",
                "operand1": 78,
                "operand2": 5,
                "question": "78.0 ÷ 5 = ?",
                "answer": 15.6,
                "correctAnswer": "15.6",
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                "id": 20,
                "type": "decimals",
                "subType": "add",
                "operand1": 7.1,
                "operand2": 2.8,
                "question": "7.1 + 2.8 = ?",
                "answer": 9.9,
                "correctAnswer": "9.9",
                "difficulty": "normal"
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