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Author:
黃斌
GeoGebra
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【案例】2013年安徽高考15题
異分母分數減法
直角坐標平面上的旋轉變換
兩位數除以一位數（二）
三位數除以一位數（一）
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形心
三角形重心(相關說明)
鏡面反射光線
幾何問題_圓01
How to draw a heptagon with ruler andcomp…
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Difference and Slope
Distributions
Logarithmic Functions
Limits
Interest Calculation