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兩圓內外公切線
Author:
梅
GeoGebra
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算柱 (兩位數)
四邉形 (四年級) 教師版
兩位數加法
【案例】圆柱体内放置一个大球六个小球
異分母分數減法
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Addition and Subtraction of Directed Numbers (1) 有向數加減(1)
labyrinth
正弦函数图象的形成
序列嵌套
線性規劃例10
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Angles
Median Line
Vectors 3D (Three-Dimensional)
LCM and GCD
Ratios