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Author:
吳秉沂
GeoGebra
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兩位數除以一位數（二）
算柱 (兩位數)
四邉形 (四年級) 教師版
找出對稱軸
異分母分數減法
Discover Resources
美麗的剪紙
拋物線(開口向上)
千年曆
太陽系的認識(問答)
圖形
Discover Topics
Differential Calculus
Tangent Line or Tangent
Set Theory
Cone
Pie Chart or Circle Chart