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根據百分率找數量（二）: 例2
Author:
GeoGebra Institute of Hong Kong
Topic:
Percentages
GeoGebra
New Resources
兩組對邊相等的四邊形
兩位數加法
判斷球體
拼砌四邊形
四邊形的特性
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柏拉圖宇宙模型
rainbow
梯形
時鐘與數學
Hyperbola_Horizontal
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Functions
Cosine
Numbers
Cube
Volume