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Author:
孟宝兴
GeoGebra
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算柱 (兩位數)
異分母分數減法
三位數除以一位數（二）
【案例】2018年全国1卷理科12题
画直线等分三角形的面积
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直線排列 2
How to draw a heptagon with ruler andcomp…
周界
學習活動七頂點法
數學電腦繪圖與解題
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Polygons
Sine
Complex Numbers
Median Value
Planes