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根據百分率找數量（一）: 例3的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
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兩位數除以一位數（二）
兩組對邊相等的四邊形
異分母分數減法
畫出對稱圖形
【案例】圆柱体内放置一个大球六个小球
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学用数学
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Division
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