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Author:
johnmayhk
GeoGebra
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画直线等分三角形的面积
第八周作业
三位數除以一位數（二）
兩位數加法
拼砌四邊形
Discover Resources
練習
盾牌(小動畫)
Distributive Law of Multiplication 1 (乘法的分配率 1)
GGB1
展開圓面積 (講義版)的副本
Discover Topics
Poisson Distribution
Quadrilaterals
Logic
Boxplot
Hyperbola