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分数加发
Author:
杨欣霞
GeoGebra
New Resources
三位數除以一位數（二）
判斷球體
兩位數加法
算柱 (兩位數)
兩位數除以一位數（一）
Discover Resources
正四面體的旋轉對稱
常態分配
平方根
cow function
周界-平移法(練習四)
Discover Topics
Orthocenter
Upper and Lower Sum or Riemann Sum
Rational Numbers
Vectors 2D (Two-Dimensional)
Ratios