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拼貼3
Author:
李伶芳
GeoGebra
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異分母分數減法
錐體建築師
兩位數加法
算柱 (兩位數)
小数 的副本
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圍棋名人賽
简易立体几何
fastest curve
congruent (SA) 2
比例中的定值問題(一)
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Coordinates
Solids or 3D Shapes
Unit Circle
Prism
Translation