{
  "id": "B040",
  "title": "题算对了却抄成另一道：怎样核对草稿到答题纸的转写",
  "checked_at": "2026-10-24",
  "level": "offline_fixture",
  "note": "四组为原创转写夹具。先核输入忠实，再核计算成立；更正必须回到原题。",
  "columns": [
    "题号",
    "原题",
    "草稿",
    "誊写",
    "最早偏差与修复"
  ],
  "rows": [
    [
      "甲",
      "36−9",
      "36−9=27",
      "36+9=27",
      "草稿→誊写改符号；恢复36−9=27"
    ],
    [
      "乙",
      "54÷6",
      "54÷9=6",
      "54÷9=6",
      "原题→草稿改除数；恢复54÷6=9"
    ],
    [
      "丙",
      "25−7",
      "25−7=18",
      "52−7=18",
      "草稿→誊写倒序；恢复25−7=18"
    ],
    [
      "丁",
      "8×6",
      "8×6=48",
      "8×6=48",
      "一致，计算成立"
    ]
  ],
  "input_output": {
    "cases": [
      {
        "original": "36-9",
        "draft": "36-9",
        "draft_answer": 27,
        "copy": "36+9",
        "copy_answer": 27,
        "first_change": "draft_to_copy",
        "correct": 27
      },
      {
        "original": "54/6",
        "draft": "54/9",
        "draft_answer": 6,
        "copy": "54/9",
        "copy_answer": 6,
        "first_change": "original_to_draft",
        "correct": 9
      },
      {
        "original": "25-7",
        "draft": "25-7",
        "draft_answer": 18,
        "copy": "52-7",
        "copy_answer": 18,
        "first_change": "draft_to_copy",
        "correct": 18
      },
      {
        "original": "8*6",
        "draft": "8*6",
        "draft_answer": 48,
        "copy": "8*6",
        "copy_answer": 48,
        "first_change": null,
        "correct": 48
      }
    ]
  }
}