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Author:
徐长俊
GeoGebra
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兩位數加法
三位數除以一位數（二）
GeoGebra笔记功能体验课件
四邉形 (四年級) 教師版
畫出對稱圖形
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模擬3D空間物件：空間坐標軸的建立
ex_1
Triangle on sphere
二階克拉瑪公式_找x
剪切成正三棱柱（制作：李三军，修订：孟宝兴）
Discover Topics
Division
Rectangle
Geometric Distribution
Similarity Transformation or Similarity
Volume