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同心圓和線段-3(線段到最外圓有小圓)
Author:
jessice
GeoGebra
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三位數除以一位數（一）
柱體建築師
兩位數加法
第八周作业
找出對稱軸
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Erdos-Mordell 不等式
基測試題五邊形滾動
小學數學比賽 2014
Copy of 閱讀鐘面及數字鐘（時和分）
解構正立方體
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Piecewise Functions
Hypothesis Testing
Fractions
Power Functions
Incircle or Inscribed Circle