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Author:
Chan Yip-Cheung
GeoGebra
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兩位數加法
兩位數除以一位數(二)
兩位數除以一位數(一)
兩組對邊相等的四邊形
三位數除以一位數(一)
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過圓內c點的弦中點軌跡
周界
ptccs2new
乘法计时训练
〃Two〃
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Reflection
Diagrams
Solids or 3D Shapes
Equilateral Triangles
Binomial Distribution