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GeoGebra
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拼砌四邊形
兩位數加法
異分母分數減法
錐體建築師
GeoGebra笔记功能体验课件
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Symmetric設計對稱圖案(兩條對稱軸)(斜)
數學操作課程_20150920
直徑式的原理
Activity 1
operations of matrix 2rd ver
Discover Topics
Triangles
Rational Numbers
Dilation
Planes
Subtraction