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Author:
myao1999
GeoGebra
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兩組對邊相等和有直角的四邊形
異分母分數減法
算柱 (兩位數)
兩位數除以一位數（一）
三位數除以一位數（二）
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三角形外心探討
过圆上一点作切线，三步
angle
函数作图工具的副本
Copy of 折扣 例5
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Percentages
Tree Diagrams
Boxplot
General Quadrilateral
Rational Numbers