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Author:
Ng Cheuk Hei
GeoGebra
GeoGebra
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兩位數加法
兩組對邊相等的四邊形
異分母分數減法
兩位數除以一位數（一）
GeoGebra笔记功能体验课件
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測試 ...
讀量杯上的刻度 (練習)
求一數佔全部的幾分之幾？
HW question locus 4
繡曲線
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Surface
Angles
Arithmetic Mean
Rectangle
Multiplication