B Set 99 Unknown

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                "id": 1,
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                "operand1": 9.9,
                "operand2": 3,
                "question": "9.9 ÷ 3 = ?",
                "answer": 3.3,
                "correctAnswer": "3.3",
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            {
                "id": 2,
                "type": "decimals",
                "subType": "multiply",
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                "operand2": 3.9,
                "question": "4.8 × 3.9 = ?",
                "answer": 18.72,
                "correctAnswer": "18.72",
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            },
            {
                "id": 3,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 17.8,
                "operand2": 13.6,
                "question": "17.8 - 13.6 = ?",
                "answer": 4.2,
                "correctAnswer": "4.2",
                "difficulty": "normal"
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            {
                "id": 4,
                "type": "decimals",
                "subType": "divide",
                "operand1": 42.8,
                "operand2": 4,
                "question": "42.8 ÷ 4 = ?",
                "answer": 10.7,
                "correctAnswer": "10.7",
                "difficulty": "normal"
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            {
                "id": 5,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 1.4,
                "operand2": 8.1,
                "question": "1.4 × 8.1 = ?",
                "answer": 11.34,
                "correctAnswer": "11.34",
                "difficulty": "normal"
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            {
                "id": 6,
                "type": "decimals",
                "subType": "add",
                "operand1": 7.6,
                "operand2": 13,
                "question": "7.6 + 13.0 = ?",
                "answer": 20.6,
                "correctAnswer": "20.6",
                "difficulty": "normal"
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                "id": 7,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 4.2,
                "operand2": 3.7,
                "question": "4.2 - 3.7 = ?",
                "answer": 0.5,
                "correctAnswer": "0.5",
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                "id": 8,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 5,
                "operand2": 1.7,
                "question": "5.0 - 1.7 = ?",
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                "id": 9,
                "type": "decimals",
                "subType": "add",
                "operand1": 12.4,
                "operand2": 6.5,
                "question": "12.4 + 6.5 = ?",
                "answer": 18.9,
                "correctAnswer": "18.9",
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            {
                "id": 10,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 14.8,
                "operand2": 0.9,
                "question": "14.8 - 0.9 = ?",
                "answer": 13.9,
                "correctAnswer": "13.9",
                "difficulty": "normal"
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            {
                "id": 11,
                "type": "decimals",
                "subType": "divide",
                "operand1": 13.3,
                "operand2": 7,
                "question": "13.3 ÷ 7 = ?",
                "answer": 1.9,
                "correctAnswer": "1.9",
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            {
                "id": 12,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 19.8,
                "operand2": 9.7,
                "question": "19.8 × 9.7 = ?",
                "answer": 192.06,
                "correctAnswer": "192.06",
                "difficulty": "normal"
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            {
                "id": 13,
                "type": "decimals",
                "subType": "divide",
                "operand1": 20.4,
                "operand2": 6,
                "question": "20.4 ÷ 6 = ?",
                "answer": 3.4,
                "correctAnswer": "3.4",
                "difficulty": "normal"
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                "id": 14,
                "type": "decimals",
                "subType": "add",
                "operand1": 12,
                "operand2": 1.6,
                "question": "12.0 + 1.6 = ?",
                "answer": 13.6,
                "correctAnswer": "13.6",
                "difficulty": "normal"
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            {
                "id": 15,
                "type": "decimals",
                "subType": "divide",
                "operand1": 141.3,
                "operand2": 9,
                "question": "141.3 ÷ 9 = ?",
                "answer": 15.7,
                "correctAnswer": "15.7",
                "difficulty": "normal"
            },
            {
                "id": 16,
                "type": "decimals",
                "subType": "divide",
                "operand1": 38.4,
                "operand2": 6,
                "question": "38.4 ÷ 6 = ?",
                "answer": 6.4,
                "correctAnswer": "6.4",
                "difficulty": "normal"
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            {
                "id": 17,
                "type": "decimals",
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                "operand1": 14.5,
                "operand2": 12.7,
                "question": "14.5 - 12.7 = ?",
                "answer": 1.8,
                "correctAnswer": "1.8",
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            {
                "id": 18,
                "type": "decimals",
                "subType": "divide",
                "operand1": 51.5,
                "operand2": 5,
                "question": "51.5 ÷ 5 = ?",
                "answer": 10.3,
                "correctAnswer": "10.3",
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            {
                "id": 19,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 1.2,
                "operand2": 8.4,
                "question": "1.2 × 8.4 = ?",
                "answer": 10.08,
                "correctAnswer": "10.08",
                "difficulty": "normal"
            },
            {
                "id": 20,
                "type": "decimals",
                "subType": "add",
                "operand1": 14,
                "operand2": 16.8,
                "question": "14.0 + 16.8 = ?",
                "answer": 30.8,
                "correctAnswer": "30.8",
                "difficulty": "normal"
            }
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