B Set 50 Unknown

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                "operand2": 1,
                "question": "13.6 - 1.0 = ?",
                "answer": 12.6,
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                "id": 2,
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                "subType": "divide",
                "operand1": 196,
                "operand2": 10,
                "question": "196.0 ÷ 10 = ?",
                "answer": 19.6,
                "correctAnswer": "19.6",
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            {
                "id": 3,
                "type": "decimals",
                "subType": "divide",
                "operand1": 100.5,
                "operand2": 5,
                "question": "100.5 ÷ 5 = ?",
                "answer": 20.1,
                "correctAnswer": "20.1",
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                "id": 4,
                "type": "decimals",
                "subType": "add",
                "operand1": 13.9,
                "operand2": 8.4,
                "question": "13.9 + 8.4 = ?",
                "answer": 22.3,
                "correctAnswer": "22.3",
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            {
                "id": 5,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 17.5,
                "operand2": 15.3,
                "question": "17.5 - 15.3 = ?",
                "answer": 2.2,
                "correctAnswer": "2.2",
                "difficulty": "normal"
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                "id": 6,
                "type": "decimals",
                "subType": "add",
                "operand1": 11.4,
                "operand2": 15.1,
                "question": "11.4 + 15.1 = ?",
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                "id": 7,
                "type": "decimals",
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                "operand1": 4,
                "operand2": 0.9,
                "question": "4.0 - 0.9 = ?",
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                "id": 8,
                "type": "decimals",
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                "operand1": 1.6,
                "operand2": 7,
                "question": "1.6 × 7 = ?",
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                "id": 9,
                "type": "decimals",
                "subType": "divide",
                "operand1": 24.6,
                "operand2": 3,
                "question": "24.6 ÷ 3 = ?",
                "answer": 8.2,
                "correctAnswer": "8.2",
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                "id": 10,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 15.2,
                "operand2": 11.3,
                "question": "15.2 - 11.3 = ?",
                "answer": 3.9,
                "correctAnswer": "3.9",
                "difficulty": "normal"
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                "id": 11,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 17.7,
                "operand2": 17.4,
                "question": "17.7 - 17.4 = ?",
                "answer": 0.3,
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                "id": 12,
                "type": "decimals",
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                "operand1": 12.2,
                "operand2": 10.8,
                "question": "12.2 - 10.8 = ?",
                "answer": 1.4,
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                "id": 13,
                "type": "decimals",
                "subType": "add",
                "operand1": 6.4,
                "operand2": 0.2,
                "question": "6.4 + 0.2 = ?",
                "answer": 6.6,
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                "id": 14,
                "type": "decimals",
                "subType": "divide",
                "operand1": 49.8,
                "operand2": 6,
                "question": "49.8 ÷ 6 = ?",
                "answer": 8.3,
                "correctAnswer": "8.3",
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            {
                "id": 15,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 11.1,
                "operand2": 6,
                "question": "11.1 - 6.0 = ?",
                "answer": 5.1,
                "correctAnswer": "5.1",
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                "id": 16,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 5.4,
                "operand2": 4.5,
                "question": "5.4 × 4.5 = ?",
                "answer": 24.3,
                "correctAnswer": "24.3",
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                "id": 17,
                "type": "decimals",
                "subType": "divide",
                "operand1": 74,
                "operand2": 10,
                "question": "74.0 ÷ 10 = ?",
                "answer": 7.4,
                "correctAnswer": "7.4",
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                "id": 18,
                "type": "decimals",
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                "operand1": 2.2,
                "operand2": 2.1,
                "question": "2.2 + 2.1 = ?",
                "answer": 4.3,
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                "id": 19,
                "type": "decimals",
                "subType": "add",
                "operand1": 4.1,
                "operand2": 12.3,
                "question": "4.1 + 12.3 = ?",
                "answer": 16.4,
                "correctAnswer": "16.4",
                "difficulty": "normal"
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                "id": 20,
                "type": "decimals",
                "subType": "add",
                "operand1": 15.9,
                "operand2": 8.9,
                "question": "15.9 + 8.9 = ?",
                "answer": 24.8,
                "correctAnswer": "24.8",
                "difficulty": "normal"
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