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椭圆的定义
Author:
梁航宇
GeoGebra
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異分母分數減法
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
找出對稱軸
兩位數除以一位數（二）
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習題二
均分除法（整數÷整數）
七巧板
空间几何体的表面积和体积
正方體展開(動畫脫鉤).ggb
Discover Topics
Ratios
Real Numbers
General Quadrilateral
Probability
Hypergeometric Distribution