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梯形面積(求上底)
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lkkbmaths teachers 檔案儲存用
GeoGebra
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兩位數除以一位數（二）
異分母分數減法
錐體建築師
三位數除以一位數（一）
画直线等分三角形的面积
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dabuhe
練習1
P6數學
小学奥数
作業1
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Integral Calculus
Parallelogram
Conditional Probability
Means
Median Line