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ptccs2new3
Author:
Cheung Wing Chuen
GeoGebra
New Resources
拼砌四邊形
GeoGebra笔记功能体验课件
三位數除以一位數（二）
算柱 (兩位數)
四邉形 (四年級) 教師版
Discover Resources
等腰三角形內嵌矩形
ex 4
平行線法
一般變換的副本
分数加法 Fraction Addition
Discover Topics
Correlation
Stochastic Process or Random Process
Line Segment
Pie Chart or Circle Chart
Equilateral Triangles