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根據百分率找數量（一）:例1的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
画直线等分三角形的面积
四邊形的特性
異分母分數減法
畫出對稱圖形
兩位數加法
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大福彩開獎機
测试 = =
國旗動畫
展開圓面積 (講義版)的副本
Copy of 分數加法
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Linear Regression
Hypothesis Testing
Planes
Intersection
Mode