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百分數：折扣 / 賺賠
Author:
LKCSS Mathematics
,
Anthony OR 柯志明
HTML5 版：
http://ggbtu.be/m64174
GeoGebra
柯志明 香港教育局
New Resources
Earth with coastline
算柱 (兩位數)
畫出對稱圖形
兩組對邊相等和有直角的四邊形
近似值：有效數字
Discover Resources
行程圖 (Travel Graph)
一次函數平移(進階)
二元一次方程式1
三圓外切2
椭圆内切圆链
Discover Topics
Root
Logarithm
Hyperbola
Arithmetic Mean
Step Functions