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Author:
赵林
GeoGebra
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兩位數加法
四邊形的特性
兩位數除以一位數（二）
三位數除以一位數（一）
【案例】2018年全国1卷理科12题
Discover Resources
Area of Triangle_1
生日悖論
減法
拼貼3
伸縮矩陣的副本
Discover Topics
Constructions
Real Numbers
Equilateral Triangles
Trigonometric Functions
Continuity