{
  "schemaVersion": "1.1",
  "unitId": "m-531",
  "number": 531,
  "no": 531,
  "title": "孩子的数学理解是怎样发生的",
  "subtitle": "从旧知识的重新理解到有根据的保留与修订",
  "authors": [
    "陈春妮"
  ],
  "type": "reading-learning-dialogue",
  "publicationStatus": "online-edition",
  "sourceEdition": "统稿三审网络发布版 · 2026年10月",
  "revision": "20261030-chenchunni-reviewed-v1-isbn",
  "parts": 5,
  "chapters": 25,
  "readingSections": 33,
  "learningTasks": 25,
  "agentName": "知返",
  "readingUrl": "https://sdeuniverses.com/books/m/531/read.html",
  "textUrl": "https://sdeuniverses.com/books/m/531/text/",
  "pdfUrl": "https://sdeuniverses.com/books/m/531/book-reader.pdf",
  "printPdfUrl": "https://sdeuniverses.com/books/m/531/book-reader.pdf",
  "learningUrl": "https://sdeuniverses.com/books/m/531/agent/learning.html",
  "agentUrl": "https://sdeuniverses.com/books/m/531/agent/dialogue.html",
  "learningPackUrl": "https://sdeuniverses.com/books/m/531/unit/workbook.html",
  "sourceBodySha256": "0f03d5b5ce2002d57e5413bdce1502d1835d90934ce03574a1ddb36094a3dbba",
  "sourceHtmlSha256": "483f1a2ca086b54605f1c7d7f10319fff19a4bf00a1b1885fec86902dcd1c780",
  "sourceModelSha256": "b98255f8810753f2436a1639d2ae5f502b3f54ee02fa541e72ac2b73f263ff4d",
  "bodyHanzi": 185990,
  "countRule": "定稿语义模型blocks中全部段落及表格文字的基本汉字；含导论、正文、结语、附录和标题，不含封面、简介、自动目录。",
  "realModelTested": false,
  "learningEffectTested": false,
  "editorialReview": "三轮内部审查与作者口径统稿",
  "isbnStatus": "site-allocated-checksum-valid",
  "priceStatus": "not-set-in-this-request",
  "pageSizeMm": [
    190,
    250
  ],
  "assets": {
    "book-reader.pdf": {
      "bytes": 6272309,
      "sha256": "24a60e01319bdb1887b4577e039f8aa7daeaecfee9b6688e2b5c0f283166c2c0"
    },
    "book.docx": {
      "bytes": 902004,
      "sha256": "a78e5b8ac333992e05c44a04af3798dc5c0a5a78986a4b61159549280bcdb9ab"
    },
    "learning-pack.pdf": {
      "bytes": 1681330,
      "sha256": "83017169e8e7a7abfe215b82489e0b08f25b4f553983ece459282e817b3ec01b"
    },
    "learning-pack.docx": {
      "bytes": 68655,
      "sha256": "fa8c1eb0273a6d3bb6da6f0f59e3cc9a1c12f69fe76b80d663d89962a7594389"
    },
    "cover.png": {
      "bytes": 178542,
      "sha256": "6fda105752984781f45de2902a2d614e297cc075714f4f494278cd192b603f2a"
    },
    "cover.svg": {
      "bytes": 3069,
      "sha256": "18d236852671b74f71a067ef986c46fb39b37f5c22782dff12d69cff086bb082"
    }
  },
  "pdfPages": 324,
  "printPdfPages": 324,
  "agentKit": {
    "url": "https://sdeuniverses.com/books/m/531/unit/agent-kit.zip",
    "sha256": "1289dc95a8ddfb749f967c38fd205f1cf7fa7694221b2ff418957edfaac63d3f",
    "bytes": 1022782,
    "files": 51
  },
  "printPdfLabel": "整书PDF / 双面校样",
  "isbn": "979-8-90690-531-4",
  "isbnNormalized": "9798906905314",
  "registryAuthorityVerified": false,
  "isbnAssignedAt": "2026-10-30T11:22:34+00:00",
  "isbnAllocationCheck": {
    "auditHead": "692ee64371ef8f82070911d406bee5084a31682d",
    "catalogBooks": 516,
    "reservationRecords": 106,
    "numericBookDirectories": 505,
    "volumeAlreadyAssignedToThisTitle": true,
    "volumeAndTitleUnique": true,
    "isbnAbsentInCatalogAndReservationsBeforeAssignment": true,
    "weightedSumFirst12": 126,
    "checkDigit": 4
  },
  "bibliographicUpdate": {
    "revision": "20261030-chenchunni-reviewed-v1-isbn",
    "date": "2026-10-30",
    "scope": "ISBN与卷号身份同步；正文、目录与分页保留",
    "bookPages": 324,
    "learningPackPages": 45
  }
}
