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Author:
航 杨
GeoGebra
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兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
判斷球體
異分母分數減法
四邉形 (四年級) 教師版
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雙曲線
優良作品8(宜庭)
棒形圖(我最喜愛的科目)
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Centres
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Logarithmic Functions
Linear Functions
Incircle or Inscribed Circle
Right Triangles
Arithmetic Operations