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Author:
chengshihfeng
GeoGebra
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柱體建築師
兩位數加法
拼砌四邊形
錐體建築師
異分母分數減法
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測試
立體線圈
軌跡方程式-重心軌跡
多重指令
拼數咭
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Optimization Problems
Subtraction
Rational Numbers
Matrices
Arithmetic