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proof 49 黃彥淇
Author:
郭亮偉
GeoGebra
New Resources
算柱 (兩位數)
兩位數加法
異分母分數減法
三位數除以一位數（一）
錐體建築師
Discover Resources
waaachen
向量
畢氏定理的證明(三移動)
电子表格建点
選擇合適的「中間人」
Discover Topics
Functions
Ellipse
Multiplication
Division
Rational Numbers