B Set 7 Unknown

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                "operand2": 18,
                "question": "9.3 + 18.0 = ?",
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                "id": 4,
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                "operand2": 14.4,
                "question": "15.2 - 14.4 = ?",
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                "type": "decimals",
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                "operand1": 18.1,
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                "question": "18.1 + 12.8 = ?",
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                "id": 7,
                "type": "decimals",
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                "operand1": 110.4,
                "operand2": 6,
                "question": "110.4 ÷ 6 = ?",
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                "id": 10,
                "type": "decimals",
                "subType": "add",
                "operand1": 2.3,
                "operand2": 10,
                "question": "2.3 + 10.0 = ?",
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                "id": 11,
                "type": "decimals",
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                "operand1": 6.6,
                "operand2": 3.9,
                "question": "6.6 - 3.9 = ?",
                "answer": 2.7,
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                "id": 15,
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                "operand1": 3.6,
                "operand2": 3.1,
                "question": "3.6 - 3.1 = ?",
                "answer": 0.5,
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                "type": "decimals",
                "subType": "add",
                "operand1": 15.1,
                "operand2": 7.3,
                "question": "15.1 + 7.3 = ?",
                "answer": 22.4,
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                "id": 17,
                "type": "decimals",
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                "operand1": 19.3,
                "operand2": 5.2,
                "question": "19.3 - 5.2 = ?",
                "answer": 14.1,
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                "operand1": 7.4,
                "operand2": 3.3,
                "question": "7.4 - 3.3 = ?",
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                "operand1": 5.3,
                "operand2": 1.7,
                "question": "5.3 - 1.7 = ?",
                "answer": 3.6,
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                "id": 20,
                "type": "decimals",
                "subType": "add",
                "operand1": 7,
                "operand2": 14,
                "question": "7.0 + 14.0 = ?",
                "answer": 21,
                "correctAnswer": "21",
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