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百分數（小學）：折扣 / 賺賠
Author:
Anthony OR 柯志明
English version:
64151 Percentages: Selling Problems
柯志明 香港 GeoGebra 學院
Discover Resources
Creating a Parametric Circle
Sum of Interior Angles of a Triangle
SAS-1
Angles on Parallel Lines
Points of Concurrency
New Resources
Trapezoid
Complex Roots of Quadratic Functions
Annie_Rhombus
Binomial Probability Problems
Annie_3:1Rectangle
