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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
GeoGebra
New Resources
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
Claude 解幾何題
國旗 (Claude 版)
Discover Resources
乘法表的自动练习
謝爾賓斯三角形
容積盒子(加蓋)
Perpendicular lines
(008)80201辛宇婕
Discover Topics
Similarity Transformation or Similarity
Cosine
Scatter Plot
Difference and Slope
Linear Programming or Linear Optimization