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20160623
Author:
蔡孟達
GeoGebra
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球體建築師
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
異分母分數減法
算柱 (兩位數)
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根據百分率找數量（一）: 例3
圍周
The Beautiful Dance of the Earth and Venus
選修數學
圓的面積的副本
Discover Topics
Sine
Quadratic Equations
Sequences and Series
Functions
Vectors 3D (Three-Dimensional)