Subtraction Number Range Within 50 — Set 53

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                "id": 4,
                "operand1": 9,
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                "question": "9 - 5 = ___",
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            {
                "id": 5,
                "operand1": 19,
                "operand2": 7,
                "operator": "-",
                "question": "19 - 7 = ___",
                "answer": 12
            },
            {
                "id": 6,
                "operand1": 19,
                "operand2": 3,
                "operator": "-",
                "question": "19 - 3 = ___",
                "answer": 16
            },
            {
                "id": 7,
                "operand1": 36,
                "operand2": 3,
                "operator": "-",
                "question": "36 - 3 = ___",
                "answer": 33
            },
            {
                "id": 8,
                "operand1": 6,
                "operand2": 4,
                "operator": "-",
                "question": "6 - 4 = ___",
                "answer": 2,
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            {
                "id": 9,
                "operand1": 11,
                "operand2": 10,
                "operator": "-",
                "question": "11 - 10 = ___",
                "answer": 1
            },
            {
                "id": 10,
                "operand1": 5,
                "operand2": 1,
                "operator": "-",
                "question": "5 - 1 = ___",
                "answer": 4,
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            {
                "id": 11,
                "operand1": 16,
                "operand2": 15,
                "operator": "-",
                "question": "16 - 15 = ___",
                "answer": 1
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            {
                "id": 12,
                "operand1": 6,
                "operand2": 2,
                "operator": "-",
                "question": "6 - 2 = ___",
                "answer": 4,
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                "id": 13,
                "operand1": 2,
                "operand2": 1,
                "operator": "-",
                "question": "2 - 1 = ___",
                "answer": 1,
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                    "crossedCount": 1
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            },
            {
                "id": 14,
                "operand1": 49,
                "operand2": 17,
                "operator": "-",
                "question": "49 - 17 = ___",
                "answer": 32
            },
            {
                "id": 15,
                "operand1": 28,
                "operand2": 1,
                "operator": "-",
                "question": "28 - 1 = ___",
                "answer": 27
            },
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                "id": 16,
                "operand1": 43,
                "operand2": 22,
                "operator": "-",
                "question": "43 - 22 = ___",
                "answer": 21
            },
            {
                "id": 17,
                "operand1": 24,
                "operand2": 14,
                "operator": "-",
                "question": "24 - 14 = ___",
                "answer": 10
            },
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                "id": 18,
                "operand1": 19,
                "operand2": 8,
                "operator": "-",
                "question": "19 - 8 = ___",
                "answer": 11
            },
            {
                "id": 19,
                "operand1": 9,
                "operand2": 6,
                "operator": "-",
                "question": "9 - 6 = ___",
                "answer": 3,
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                "id": 20,
                "operand1": 19,
                "operand2": 13,
                "operator": "-",
                "question": "19 - 13 = ___",
                "answer": 6
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