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Author:
Sylvie
GeoGebra
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兩位數除以一位數（二）
錐體建築師
兩位數加法
四邉形 (四年級) 教師版
畫出對稱圖形
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Expansion & Factorization 展開與因式分解
旋轉方塊
第一題
sin(x) 的函數圖形的副本
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Incircle or Inscribed Circle
Trigonometric Functions
Square
Indefinite Integral
Angles