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ie 7
Author:
LAM YU SANG
GeoGebra
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sanjiaohanshu
兩組對邊相等的四邊形
GeoGebra笔记功能体验课件
畫出對稱圖形
算柱 (兩位數)
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滾動
均分除法（整數÷整數）
translation
分数的乘法
翰林數學_1下_CH2-1_直角坐標平面的認識
Discover Topics
Real Numbers
Probability
Complex Numbers
Natural Numbers
Rectangle