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3-3-12
Author:
Tzuen Hsu
GeoGebra
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算柱 (兩位數)
兩位數加法
異分母分數減法
兩組對邊相等的四邊形
兩位數除以一位數（二）
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雙心運動
HW1121505
上色練習
Rectangle
与椭圆焦点三角形外角平分线有关的轨迹.许兴华数学
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Hypothesis Testing
Dilation
Mode
Matrices
Linear Programming or Linear Optimization