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根據百分率找數量（一）: 例2的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
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球體建築師
四邉形 (四年級) 教師版
兩位數除以一位數（一）
拼砌四邊形
GeoGebra笔记功能体验课件
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減法運算
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封閉圖形的斜線區域
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Geometric Distribution
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