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Author:
俞光隆
GeoGebra
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異分母分數減法
找出對稱軸
【案例】2018年全国1卷理科12题
第八周作业
畫出對稱圖形
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Addition and Subtraction of Directed Numbers (1) 有向數加減(1)
類正五邊形摺法
生活中的平面圖形問題1
平移法（三）
Cuboid 長方體
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Integral Calculus
Unit Circle
Coordinates
Ellipse
Rectangle