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異分母分數加法
Author:
Tong Wing Hong
GeoGebra
New Resources
四邊形的特性
兩位數除以一位數（二）
拼砌四邊形
畫出對稱圖形
找出對稱軸
Discover Resources
refraction law
畫三角形 題2c
Square
Trigonometric Identities
線性規劃例7
Discover Topics
Cube
Linear Programming or Linear Optimization
Circle
Indefinite Integral
Area