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观察2
Author:
彭宽仁
GeoGebra
New Resources
錐體建築師
兩位數除以一位數（二）
找出對稱軸
GeoGebra笔记功能体验课件
兩位數加法
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進階二
P.4 對稱
小船平移2
乘法表的自动练习的副本
底数，指数，幂的函数关系
Discover Topics
Expected Value
Planes
Natural Numbers
Limits
Integral Calculus