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九九乘法表的認識
Author:
鍾文欽
GeoGebra
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【案例】2013年安徽高考15题
兩位數加法
兩位數除以一位數（二）
拼砌四邊形
画直线等分三角形的面积
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外心
EARTH01
弓形的滚动
yuanmianjituidao
反比例函数的图像与性质
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Similarity Transformation or Similarity
Geometry
Logarithm
Hypergeometric Distribution
Mathematics