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Author:
李春培
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GeoGebra
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三位數除以一位數（一）
找出對稱軸
畫出對稱圖形
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
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外公切線作圖
小時鐘
三角形內角和_1
教學成果
容量(閱讀不同刻度的量杯)
Discover Topics
Probability
Real Numbers
Differential Equation
Upper and Lower Sum or Riemann Sum
Expected Value