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Author:
yuchengda
GeoGebra
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算柱 (兩位數)
異分母分數減法
兩位數除以一位數（二）
錐體建築師
三位數除以一位數（二）
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會考小測試
練習 - 逆時針旋轉（三角形）
三心
九九乘法表 - Multiplication Table的副本
圓-符號核能
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Cone
Quadratic Equations
Equilateral Triangles
Ratios
Rectangle