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根據百分率找數量（一）: 例4的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
錐體建築師
異分母分數減法
球體建築師
兩位數除以一位數（二）
第八周作业
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範例：畫圈圈的筆
交流电的模拟
区域面积
中學(高中)
烟囱
Discover Topics
Sine
Percentages
Derivative
Square
Arithmetic