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Author:
吳秉沂
GeoGebra
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異分母分數減法
兩組對邊相等和有直角的四邊形
拼砌四邊形
GeoGebra笔记功能体验课件
兩位數除以一位數（二）
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線段與圓弧所構成的封閉區域之填色問題
Ex.1
第4課
面積題 A
Completing the Square (Part 6)
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Quadratic Equations
Integral Calculus
Cube
Kite
Diagrams