OOP:オブザーバは通知と追従の1対１の複数分解

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• Offline Activity (.zip)

• GeoGebra Files

  1. オブザーバー：番号の通知で数式、グラフ、対応表が変わる (.ggb)
     
  2. 通知と追従パタンでコードにあわせる (.ggb)