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chen mingchuan
GeoGebra
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兩位數除以一位數(二)
拼砌四邊形
兩位數加法
兩組對邊相等和有直角的四邊形
柱體建築師
Discover Resources
教學-旋轉
四邊形的特性
Magic Matches
圓周公式應用題2的副本
雪花的碎形規律
Discover Topics
Matrices
Special Points
Square
Interest Calculation
Differential Calculus