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部分佔全部的百分率 :例2
Author:
GeoGebra Institute of Hong Kong
Topic:
Percentages
GeoGebra
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讀磅
兩位數加法
兩位數除以一位數（一）
画直线等分三角形的面积
祖冲之的期望：内棋与外棋
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Demo
Mearm2
正方體和長方體體積計算公式
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三阶魔方（magic cube）
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Difference and Slope