Subtraction Number Range Within 50 — Set 43

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                "operand1": 39,
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                "question": "39 - 28 = ___",
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            {
                "id": 6,
                "operand1": 18,
                "operand2": 5,
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                "question": "18 - 5 = ___",
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            {
                "id": 7,
                "operand1": 45,
                "operand2": 15,
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                "question": "45 - 15 = ___",
                "answer": 30
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                "id": 8,
                "operand1": 18,
                "operand2": 14,
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                "question": "18 - 14 = ___",
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                "id": 9,
                "operand1": 44,
                "operand2": 20,
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                "question": "44 - 20 = ___",
                "answer": 24
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                "id": 10,
                "operand1": 23,
                "operand2": 3,
                "operator": "-",
                "question": "23 - 3 = ___",
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            {
                "id": 12,
                "operand1": 32,
                "operand2": 2,
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                "question": "32 - 2 = ___",
                "answer": 30
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                "id": 13,
                "operand1": 19,
                "operand2": 7,
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                "question": "19 - 7 = ___",
                "answer": 12
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                "id": 14,
                "operand1": 48,
                "operand2": 12,
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                "question": "48 - 12 = ___",
                "answer": 36
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                "answer": 1
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                "operand1": 11,
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                "question": "11 - 1 = ___",
                "answer": 10
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                "id": 17,
                "operand1": 14,
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                "question": "14 - 11 = ___",
                "answer": 3
            },
            {
                "id": 18,
                "operand1": 6,
                "operand2": 4,
                "operator": "-",
                "question": "6 - 4 = ___",
                "answer": 2,
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                "operand2": 33,
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                "question": "48 - 33 = ___",
                "answer": 15
            },
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                "id": 20,
                "operand1": 35,
                "operand2": 4,
                "operator": "-",
                "question": "35 - 4 = ___",
                "answer": 31
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