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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
Project 1
Trigonometric Ratios on the Cartesian Plane
Envelopes
Polígonos
Old Vermont Carpenter’s Theorem 2.0
New Resources
Linear_eqaution2
Span2D
Quiz
Example LF.4.2
פריסת פירמידה
