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根據百分率找數量（二）: 例2的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
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畫出對稱圖形
近似值：有效數字
兩位數除以一位數（二）
兩位數加法
三位數除以一位數（一）
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Quiz on Angles associated with Parallel Lines 平行線上的角：測驗
不等式
真分數乘以真分數
I love Taiwan.(可縮放和移動)
环形跑道问题案例的制作
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Boxplot
Linear Functions
Sequences and Series
Trigonometry
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