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623劉虹圻 雪花
Author:
呂麗珠
GeoGebra
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三位數除以一位數（一）
異分母分數減法
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
四邊形的特性
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K9@cn
等量公理
正切與餘切函數
Example 2
二次函數描點
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Volume
Plane Figures or Shapes
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