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李春培
GeoGebra
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三位數除以一位數（一）
拼砌四邊形
算柱 (兩位數)
畫出對稱圖形
小数 的副本
Opdag Ressourcer
Expansion & Factorization 展開與因式分解
小二均分
sine graph (reduce to 1/2 and then translate leftward by 15 degree)
Angle between 2 planes
Ex.1
Udforsk emner
Stykkevise funktioner
Sinus
Regning
Kegle
Trigonometri