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"拈" 類遊戲之一-搶21遊戲 The 21 game
Author:
侯杰材
GeoGebra
New Resources
四邊形的特性
兩位數加法
三位數除以一位數（一）
畫出對稱圖形
兩組對邊相等的四邊形
Discover Resources
Book4
Compare areas by cutting shapes Q1
P4_四下_面積（一）(教師版)
Copy of 分割圓餅圖
三角函數 角度變換(個人認為直覺上較好理解的)(手機使用教材)
Discover Topics
Random Variables
Logarithm
Probability
Division
Tangent Function