easy 4×4 Set 1 Form Exercise

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    "title": "form-exercise set 1",
    "operation": "math-bingo",
    "subject": "arithmetic",
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                    "problem": "7 - 2",
                    "answer": 5
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                {
                    "problem": "28 - 2",
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                    "problem": "2 × 9",
                    "answer": 18
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                    "problem": "10 × 2",
                    "answer": 20
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                    "problem": "5 - 1",
                    "answer": 4
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                    "problem": "10 - 2",
                    "answer": 8
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                {
                    "problem": "5 + 8",
                    "answer": 13
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                {
                    "problem": "3 + 16",
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                    "problem": "11 + 14",
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                    "problem": "6 × 4",
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                    "answer": 1
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                    "problem": "3 × 9",
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                    "problem": "3 - 1",
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                {
                    "problem": "29 × 1",
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                    "problem": "29 - 6",
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                {
                    "problem": "1 + 29",
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                {
                    "problem": "3 × 1",
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                {
                    "problem": "3 × 3",
                    "answer": 9
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                {
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            ],
            "size": 5,
            "freeCenter": true,
            "question": "Mark answers on your bingo card as problems are called.",
            "correctAnswer": "bingo"
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