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分數加法
Author:
iedc
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
兩位數加法
第八周作业
Discover Resources
Addition of 2 Directed Numbers
重複排列
GGBstar
橢圓的副本
Copy of 劉徽的「割圓術」
Discover Topics
Circle
Linear Programming or Linear Optimization
Trigonometry
Logarithm
Logic