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百分數（小學）：折扣 / 賺賠（Java 版）
Author:
Anthony OR 柯志明
HTML5 版：
http://ggbtu.be/m64174
柯志明 香港教育局
Discover Resources
NINE POINT CIRCLE
Start, Perpendicular Bisector
Pythagorean Theorem
Corral Optimization
Lines Containing Altitudes of a Triangle (V1)
New Resources
Astronomy Polar Graphing
Square-Based Pyramid
Function Diagrams
Cercul
Escape Room Map
