B Set 1 Unknown

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                "id": 1,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 1.6,
                "operand2": 0.4,
                "question": "1.6 - 0.4 = ?",
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                "correctAnswer": "1.2",
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            },
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                "id": 2,
                "type": "decimals",
                "subType": "add",
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                "operand2": 7.2,
                "question": "16.5 + 7.2 = ?",
                "answer": 23.7,
                "correctAnswer": "23.7",
                "difficulty": "normal"
            },
            {
                "id": 3,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 4.9,
                "operand2": 3.6,
                "question": "4.9 - 3.6 = ?",
                "answer": 1.3,
                "correctAnswer": "1.3",
                "difficulty": "normal"
            },
            {
                "id": 4,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 16.9,
                "operand2": 2.9,
                "question": "16.9 × 2.9 = ?",
                "answer": 49.01,
                "correctAnswer": "49.01",
                "difficulty": "normal"
            },
            {
                "id": 5,
                "type": "decimals",
                "subType": "divide",
                "operand1": 11,
                "operand2": 5,
                "question": "11.0 ÷ 5 = ?",
                "answer": 2.2,
                "correctAnswer": "2.2",
                "difficulty": "normal"
            },
            {
                "id": 6,
                "type": "decimals",
                "subType": "divide",
                "operand1": 26.7,
                "operand2": 3,
                "question": "26.7 ÷ 3 = ?",
                "answer": 8.9,
                "correctAnswer": "8.9",
                "difficulty": "normal"
            },
            {
                "id": 7,
                "type": "decimals",
                "subType": "add",
                "operand1": 17.2,
                "operand2": 15,
                "question": "17.2 + 15.0 = ?",
                "answer": 32.2,
                "correctAnswer": "32.2",
                "difficulty": "normal"
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            {
                "id": 8,
                "type": "decimals",
                "subType": "divide",
                "operand1": 89.4,
                "operand2": 6,
                "question": "89.4 ÷ 6 = ?",
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                "id": 9,
                "type": "decimals",
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                "operand2": 8.3,
                "question": "15.9 × 8.3 = ?",
                "answer": 131.97,
                "correctAnswer": "131.97",
                "difficulty": "normal"
            },
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                "id": 10,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 9.8,
                "operand2": 5.9,
                "question": "9.8 × 5.9 = ?",
                "answer": 57.82,
                "correctAnswer": "57.82",
                "difficulty": "normal"
            },
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                "id": 11,
                "type": "decimals",
                "subType": "add",
                "operand1": 6.7,
                "operand2": 10.5,
                "question": "6.7 + 10.5 = ?",
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                "id": 12,
                "type": "decimals",
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                "operand1": 1.9,
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                "question": "1.9 - 0.5 = ?",
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                "id": 13,
                "type": "decimals",
                "subType": "divide",
                "operand1": 59.6,
                "operand2": 4,
                "question": "59.6 ÷ 4 = ?",
                "answer": 14.9,
                "correctAnswer": "14.9",
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                "id": 14,
                "type": "decimals",
                "subType": "divide",
                "operand1": 15.5,
                "operand2": 5,
                "question": "15.5 ÷ 5 = ?",
                "answer": 3.1,
                "correctAnswer": "3.1",
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            {
                "id": 15,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 1.6,
                "operand2": 10,
                "question": "1.6 × 10 = ?",
                "answer": 16,
                "correctAnswer": "16",
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            {
                "id": 16,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 0.9,
                "operand2": 0.5,
                "question": "0.9 - 0.5 = ?",
                "answer": 0.4,
                "correctAnswer": "0.4",
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                "id": 17,
                "type": "decimals",
                "subType": "add",
                "operand1": 9.9,
                "operand2": 5.9,
                "question": "9.9 + 5.9 = ?",
                "answer": 15.8,
                "correctAnswer": "15.8",
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                "id": 18,
                "type": "decimals",
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                "operand1": 3.7,
                "operand2": 4.8,
                "question": "3.7 × 4.8 = ?",
                "answer": 17.76,
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                "id": 19,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 8.6,
                "operand2": 7.2,
                "question": "8.6 × 7.2 = ?",
                "answer": 61.92,
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                "difficulty": "normal"
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                "id": 20,
                "type": "decimals",
                "subType": "add",
                "operand1": 14.3,
                "operand2": 16.2,
                "question": "14.3 + 16.2 = ?",
                "answer": 30.5,
                "correctAnswer": "30.5",
                "difficulty": "normal"
            }
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