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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
三位數除以一位數（一）
算柱 (兩位數)
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（一）
Discover Resources
Primary Mathematics
大樂透開獎機
費爾巴哈(Feuerbach)定理
學習活動二之三解的圖形
圆锥侧面展开
Discover Topics
Logic
Translation
Algebra
Vectors 3D (Three-Dimensional)
Variance