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Escher 階梯 (Penrose Stair)
Author:
連琨銘
GeoGebra
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判斷球體
錐體建築師
三位數除以一位數（二）
四邊形的特性
異分母分數減法
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函數
Scientific Notation 科學記數法
拼貼動畫
六上：圆的面积公式推导
a>1, y=Log(a,x) and y=a^x 有可能0,1,2交點!? 的複本
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Linear Regression
Cuboid
Perimeter
Piecewise Functions
Area