B Set 65 Unknown

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                "id": 1,
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                "operand2": 9.7,
                "question": "16 × 9.7 = ?",
                "answer": 155.2,
                "correctAnswer": "155.2",
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            {
                "id": 2,
                "type": "decimals",
                "subType": "add",
                "operand1": 5.4,
                "operand2": 0.7,
                "question": "5.4 + 0.7 = ?",
                "answer": 6.1,
                "correctAnswer": "6.1",
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            },
            {
                "id": 3,
                "type": "decimals",
                "subType": "add",
                "operand1": 1.2,
                "operand2": 11.2,
                "question": "1.2 + 11.2 = ?",
                "answer": 12.4,
                "correctAnswer": "12.4",
                "difficulty": "normal"
            },
            {
                "id": 4,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 7.5,
                "operand2": 0.8,
                "question": "7.5 - 0.8 = ?",
                "answer": 6.7,
                "correctAnswer": "6.7",
                "difficulty": "normal"
            },
            {
                "id": 5,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 6.1,
                "operand2": 5.3,
                "question": "6.1 - 5.3 = ?",
                "answer": 0.8,
                "correctAnswer": "0.8",
                "difficulty": "normal"
            },
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                "id": 6,
                "type": "decimals",
                "subType": "add",
                "operand1": 9.4,
                "operand2": 3.5,
                "question": "9.4 + 3.5 = ?",
                "answer": 12.9,
                "correctAnswer": "12.9",
                "difficulty": "normal"
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            {
                "id": 7,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 3.9,
                "operand2": 0.3,
                "question": "3.9 × 0.3 = ?",
                "answer": 1.17,
                "correctAnswer": "1.17",
                "difficulty": "normal"
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            {
                "id": 8,
                "type": "decimals",
                "subType": "divide",
                "operand1": 58.5,
                "operand2": 5,
                "question": "58.5 ÷ 5 = ?",
                "answer": 11.7,
                "correctAnswer": "11.7",
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            {
                "id": 9,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 6,
                "operand2": 0.8,
                "question": "6.0 - 0.8 = ?",
                "answer": 5.2,
                "correctAnswer": "5.2",
                "difficulty": "normal"
            },
            {
                "id": 10,
                "type": "decimals",
                "subType": "divide",
                "operand1": 144.9,
                "operand2": 7,
                "question": "144.9 ÷ 7 = ?",
                "answer": 20.7,
                "correctAnswer": "20.7",
                "difficulty": "normal"
            },
            {
                "id": 11,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 10,
                "operand2": 9,
                "question": "10.0 - 9.0 = ?",
                "answer": 1,
                "correctAnswer": "1",
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                "id": 12,
                "type": "decimals",
                "subType": "add",
                "operand1": 1.8,
                "operand2": 1.4,
                "question": "1.8 + 1.4 = ?",
                "answer": 3.2,
                "correctAnswer": "3.2",
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            {
                "id": 13,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 1.4,
                "operand2": 1.2,
                "question": "1.4 - 1.2 = ?",
                "answer": 0.2,
                "correctAnswer": "0.2",
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            },
            {
                "id": 14,
                "type": "decimals",
                "subType": "divide",
                "operand1": 72,
                "operand2": 8,
                "question": "72.0 ÷ 8 = ?",
                "answer": 9,
                "correctAnswer": "9",
                "difficulty": "normal"
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            {
                "id": 15,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 6.1,
                "operand2": 1.7,
                "question": "6.1 - 1.7 = ?",
                "answer": 4.4,
                "correctAnswer": "4.4",
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            {
                "id": 16,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 10.8,
                "operand2": 4.1,
                "question": "10.8 × 4.1 = ?",
                "answer": 44.28,
                "correctAnswer": "44.28",
                "difficulty": "normal"
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            {
                "id": 17,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 17,
                "operand2": 2.7,
                "question": "17 × 2.7 = ?",
                "answer": 45.9,
                "correctAnswer": "45.9",
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            {
                "id": 18,
                "type": "decimals",
                "subType": "divide",
                "operand1": 146,
                "operand2": 10,
                "question": "146.0 ÷ 10 = ?",
                "answer": 14.6,
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                "id": 19,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 4.6,
                "operand2": 2.9,
                "question": "4.6 × 2.9 = ?",
                "answer": 13.34,
                "correctAnswer": "13.34",
                "difficulty": "normal"
            },
            {
                "id": 20,
                "type": "decimals",
                "subType": "add",
                "operand1": 19.3,
                "operand2": 0.2,
                "question": "19.3 + 0.2 = ?",
                "answer": 19.5,
                "correctAnswer": "19.5",
                "difficulty": "normal"
            }
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