B Set 20 Unknown

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                "id": 1,
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                "subType": "divide",
                "operand1": 78.5,
                "operand2": 5,
                "question": "78.5 ÷ 5 = ?",
                "answer": 15.7,
                "correctAnswer": "15.7",
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                "id": 3,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 10.6,
                "operand2": 3.7,
                "question": "10.6 × 3.7 = ?",
                "answer": 39.22,
                "correctAnswer": "39.22",
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            {
                "id": 4,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 3.3,
                "operand2": 8.3,
                "question": "3.3 × 8.3 = ?",
                "answer": 27.39,
                "correctAnswer": "27.39",
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            {
                "id": 5,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 1.6,
                "operand2": 10,
                "question": "1.6 × 10 = ?",
                "answer": 16,
                "correctAnswer": "16",
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            {
                "id": 6,
                "type": "decimals",
                "subType": "divide",
                "operand1": 44.4,
                "operand2": 6,
                "question": "44.4 ÷ 6 = ?",
                "answer": 7.4,
                "correctAnswer": "7.4",
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                "id": 7,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 3.7,
                "operand2": 3.4,
                "question": "3.7 - 3.4 = ?",
                "answer": 0.3,
                "correctAnswer": "0.3",
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                "id": 8,
                "type": "decimals",
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                "operand1": 8.9,
                "operand2": 7.5,
                "question": "8.9 - 7.5 = ?",
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                "id": 9,
                "type": "decimals",
                "subType": "add",
                "operand1": 15.6,
                "operand2": 10.8,
                "question": "15.6 + 10.8 = ?",
                "answer": 26.4,
                "correctAnswer": "26.4",
                "difficulty": "normal"
            },
            {
                "id": 10,
                "type": "decimals",
                "subType": "add",
                "operand1": 5.6,
                "operand2": 16.5,
                "question": "5.6 + 16.5 = ?",
                "answer": 22.1,
                "correctAnswer": "22.1",
                "difficulty": "normal"
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                "id": 11,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 17.9,
                "operand2": 1.4,
                "question": "17.9 × 1.4 = ?",
                "answer": 25.06,
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                "id": 12,
                "type": "decimals",
                "subType": "add",
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                "operand2": 16.2,
                "question": "3.7 + 16.2 = ?",
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                "id": 13,
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                "subType": "divide",
                "operand1": 103.5,
                "operand2": 5,
                "question": "103.5 ÷ 5 = ?",
                "answer": 20.7,
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                "id": 14,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 3.8,
                "operand2": 2,
                "question": "3.8 × 2 = ?",
                "answer": 7.6,
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                "id": 15,
                "type": "decimals",
                "subType": "add",
                "operand1": 11.6,
                "operand2": 5,
                "question": "11.6 + 5.0 = ?",
                "answer": 16.6,
                "correctAnswer": "16.6",
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                "id": 16,
                "type": "decimals",
                "subType": "subtract",
                "operand1": 11.1,
                "operand2": 8.2,
                "question": "11.1 - 8.2 = ?",
                "answer": 2.9,
                "correctAnswer": "2.9",
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                "id": 17,
                "type": "decimals",
                "subType": "multiply",
                "operand1": 8.6,
                "operand2": 8.8,
                "question": "8.6 × 8.8 = ?",
                "answer": 75.68,
                "correctAnswer": "75.68",
                "difficulty": "normal"
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                "id": 18,
                "type": "decimals",
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                "operand1": 3.1,
                "operand2": 1.6,
                "question": "3.1 - 1.6 = ?",
                "answer": 1.5,
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                "difficulty": "normal"
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                "id": 19,
                "type": "decimals",
                "subType": "divide",
                "operand1": 32.1,
                "operand2": 3,
                "question": "32.1 ÷ 3 = ?",
                "answer": 10.7,
                "correctAnswer": "10.7",
                "difficulty": "normal"
            },
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                "id": 20,
                "type": "decimals",
                "subType": "add",
                "operand1": 9.7,
                "operand2": 3.6,
                "question": "9.7 + 3.6 = ?",
                "answer": 13.3,
                "correctAnswer": "13.3",
                "difficulty": "normal"
            }
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        "layout": {
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