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Weighted Mean 加權平均數
Author:
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
畫出對稱圖形
拼砌四邊形
第八周作业
兩位數除以一位數（一）
三位數除以一位數（一）
Discover Resources
量度活動所用的時間 (時、分)
「相似三角形」任务1
angles sum of a triangle 3
分數乘法方塊
二次函数图像的性质探究
Discover Topics
LCM and GCD
Similar Triangles
Quadratic Equations
Constructions
Boxplot