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Author:
杜耀宗
GeoGebra
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兩位數除以一位數（一）
異分母分數減法
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
兩位數加法
Discover Resources
二次函數
六年級_正方體截面
三角形面積(由面積求高)
Angles in Alternate Segment
二階克拉瑪公式_找x
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Ellipse
Geometric Mean
Plane Figures or Shapes
Constructions
Power Functions