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ptccs2new4
Author:
Cheung Wing Chuen
GeoGebra
New Resources
四邉形 (四年級) 教師版
四邊形的特性
兩位數除以一位數（二）
GeoGebra笔记功能体验课件
兩組對邊相等的四邊形
Discover Resources
小二、小三_時間（教師版）
vertex
gjc100a34 兩三角形重疊面積比
禪繞畫
翰林數學_2下_CH4-2_平行四邊形性質
Discover Topics
Logarithmic Functions
Division
Geometric Transformations
Indefinite Integral
Combinatorics