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玉兔呈祥双兔報喜
Author:
李春培
玉兔呈祥
GeoGebra
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兩組對邊相等和有直角的四邊形
錐體建築師
算柱 (兩位數)
拼砌四邊形
四邉形 (四年級) 教師版
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some pic
橢圓軌跡03
Copy of 分數與小數
三年級除法(四)：一位數除三位數
P.5_FRACTION_NPMPS
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Division
Mathematics
Ellipse
Probability
Plane Figures or Shapes