B Set 28 Unknown

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                "id": 1,
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                "operand2": 9,
                "question": "2.8 + 9.0 = ?",
                "answer": 11.8,
                "correctAnswer": "11.8",
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            {
                "id": 2,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 8.3,
                "operand2": 6.8,
                "question": "8.3 × 6.8 = ?",
                "answer": 56.44,
                "correctAnswer": "56.44",
                "difficulty": "normal"
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            {
                "id": 3,
                "type": "decimals",
                "subType": "divide",
                "operand1": 4.5,
                "operand2": 3,
                "question": "4.5 ÷ 3 = ?",
                "answer": 1.5,
                "correctAnswer": "1.5",
                "difficulty": "normal"
            },
            {
                "id": 4,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 9.6,
                "operand2": 3.5,
                "question": "9.6 - 3.5 = ?",
                "answer": 6.1,
                "correctAnswer": "6.1",
                "difficulty": "normal"
            },
            {
                "id": 5,
                "type": "decimals",
                "subType": "divide",
                "operand1": 16.8,
                "operand2": 7,
                "question": "16.8 ÷ 7 = ?",
                "answer": 2.4,
                "correctAnswer": "2.4",
                "difficulty": "normal"
            },
            {
                "id": 6,
                "type": "decimals",
                "subType": "divide",
                "operand1": 118.8,
                "operand2": 9,
                "question": "118.8 ÷ 9 = ?",
                "answer": 13.2,
                "correctAnswer": "13.2",
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            {
                "id": 7,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 14.6,
                "operand2": 5,
                "question": "14.6 × 5 = ?",
                "answer": 73,
                "correctAnswer": "73",
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                "id": 8,
                "type": "decimals",
                "subType": "divide",
                "operand1": 177.3,
                "operand2": 9,
                "question": "177.3 ÷ 9 = ?",
                "answer": 19.7,
                "correctAnswer": "19.7",
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            {
                "id": 9,
                "type": "decimals",
                "subType": "divide",
                "operand1": 187.2,
                "operand2": 9,
                "question": "187.2 ÷ 9 = ?",
                "answer": 20.8,
                "correctAnswer": "20.8",
                "difficulty": "normal"
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            {
                "id": 10,
                "type": "decimals",
                "subType": "add",
                "operand1": 9.1,
                "operand2": 2.2,
                "question": "9.1 + 2.2 = ?",
                "answer": 11.3,
                "correctAnswer": "11.3",
                "difficulty": "normal"
            },
            {
                "id": 11,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 7.5,
                "operand2": 6.4,
                "question": "7.5 × 6.4 = ?",
                "answer": 48,
                "correctAnswer": "48",
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            {
                "id": 12,
                "type": "decimals",
                "subType": "add",
                "operand1": 0.4,
                "operand2": 15.3,
                "question": "0.4 + 15.3 = ?",
                "answer": 15.7,
                "correctAnswer": "15.7",
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            {
                "id": 13,
                "type": "decimals",
                "subType": "add",
                "operand1": 1,
                "operand2": 17.4,
                "question": "1.0 + 17.4 = ?",
                "answer": 18.4,
                "correctAnswer": "18.4",
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                "id": 14,
                "type": "decimals",
                "subType": "divide",
                "operand1": 38.5,
                "operand2": 5,
                "question": "38.5 ÷ 5 = ?",
                "answer": 7.7,
                "correctAnswer": "7.7",
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            {
                "id": 15,
                "type": "decimals",
                "subType": "divide",
                "operand1": 15.6,
                "operand2": 2,
                "question": "15.6 ÷ 2 = ?",
                "answer": 7.8,
                "correctAnswer": "7.8",
                "difficulty": "normal"
            },
            {
                "id": 16,
                "type": "decimals",
                "subType": "add",
                "operand1": 12.1,
                "operand2": 19.7,
                "question": "12.1 + 19.7 = ?",
                "answer": 31.8,
                "correctAnswer": "31.8",
                "difficulty": "normal"
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            {
                "id": 17,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 16.1,
                "operand2": 5.2,
                "question": "16.1 × 5.2 = ?",
                "answer": 83.72,
                "correctAnswer": "83.72",
                "difficulty": "normal"
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                "id": 18,
                "type": "decimals",
                "subType": "add",
                "operand1": 0.4,
                "operand2": 18,
                "question": "0.4 + 18.0 = ?",
                "answer": 18.4,
                "correctAnswer": "18.4",
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                "id": 19,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 1.4,
                "operand2": 1.3,
                "question": "1.4 - 1.3 = ?",
                "answer": 0.1,
                "correctAnswer": "0.1",
                "difficulty": "normal"
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                "id": 20,
                "type": "decimals",
                "subType": "add",
                "operand1": 16,
                "operand2": 12.4,
                "question": "16.0 + 12.4 = ?",
                "answer": 28.4,
                "correctAnswer": "28.4",
                "difficulty": "normal"
            }
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