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Author:
王正豪
GeoGebra
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近似值：有效數字
sanjiaohanshu
GeoGebra笔记功能体验课件
四邉形 (四年級) 教師版
三位數除以一位數（一）
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減法
兩位小數GAME
數據分析2
應用圓周率: 題3
广义三角函数的化简(诱导公式)的副本
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Definite Integral
Triangles
Isosceles Triangles
Rectangle
Vectors 3D (Three-Dimensional)