Subtraction Number Range Within 30 — Set 63

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                "operand1": 18,
                "operand2": 17,
                "operator": "-",
                "question": "18 - 17 = ___",
                "answer": 1
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                "operand1": 17,
                "operand2": 5,
                "operator": "-",
                "question": "17 - 5 = ___",
                "answer": 12
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                "id": 3,
                "operand1": 19,
                "operand2": 14,
                "operator": "-",
                "question": "19 - 14 = ___",
                "answer": 5
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                "operand2": 2,
                "operator": "-",
                "question": "4 - 2 = ___",
                "answer": 2,
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            {
                "id": 5,
                "operand1": 16,
                "operand2": 4,
                "operator": "-",
                "question": "16 - 4 = ___",
                "answer": 12
            },
            {
                "id": 6,
                "operand1": 9,
                "operand2": 2,
                "operator": "-",
                "question": "9 - 2 = ___",
                "answer": 7,
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            {
                "id": 7,
                "operand1": 12,
                "operand2": 11,
                "operator": "-",
                "question": "12 - 11 = ___",
                "answer": 1
            },
            {
                "id": 8,
                "operand1": 28,
                "operand2": 20,
                "operator": "-",
                "question": "28 - 20 = ___",
                "answer": 8
            },
            {
                "id": 9,
                "operand1": 4,
                "operand2": 1,
                "operator": "-",
                "question": "4 - 1 = ___",
                "answer": 3,
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            {
                "id": 10,
                "operand1": 15,
                "operand2": 10,
                "operator": "-",
                "question": "15 - 10 = ___",
                "answer": 5
            },
            {
                "id": 11,
                "operand1": 25,
                "operand2": 13,
                "operator": "-",
                "question": "25 - 13 = ___",
                "answer": 12
            },
            {
                "id": 12,
                "operand1": 8,
                "operand2": 5,
                "operator": "-",
                "question": "8 - 5 = ___",
                "answer": 3,
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                "id": 13,
                "operand1": 17,
                "operand2": 14,
                "operator": "-",
                "question": "17 - 14 = ___",
                "answer": 3
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            {
                "id": 14,
                "operand1": 7,
                "operand2": 6,
                "operator": "-",
                "question": "7 - 6 = ___",
                "answer": 1,
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                    "crossedCount": 6
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            {
                "id": 15,
                "operand1": 28,
                "operand2": 5,
                "operator": "-",
                "question": "28 - 5 = ___",
                "answer": 23
            },
            {
                "id": 16,
                "operand1": 19,
                "operand2": 13,
                "operator": "-",
                "question": "19 - 13 = ___",
                "answer": 6
            },
            {
                "id": 17,
                "operand1": 29,
                "operand2": 10,
                "operator": "-",
                "question": "29 - 10 = ___",
                "answer": 19
            },
            {
                "id": 18,
                "operand1": 13,
                "operand2": 12,
                "operator": "-",
                "question": "13 - 12 = ___",
                "answer": 1
            },
            {
                "id": 19,
                "operand1": 26,
                "operand2": 4,
                "operator": "-",
                "question": "26 - 4 = ___",
                "answer": 22
            },
            {
                "id": 20,
                "operand1": 26,
                "operand2": 25,
                "operator": "-",
                "question": "26 - 25 = ___",
                "answer": 1
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