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中點軌跡觀察
Author:
劉軒宏
GeoGebra
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兩位數加法
異分母分數減法
畫出對稱圖形
三位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
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物件的平移概念
PA + PB
slope
閱讀鐘面及數字鐘（時和分）的副本
椭圆规
Discover Topics
Constructions
Scatter Plot
Matrices
Geometry
Subtraction