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分數均分
Author:
唐宗浩
Topic:
Fractions
改作部份：修顏色 原作者 Anthony Or. Education Bureau, Hong Kong. (English version:
http://www.geogebratube.org/student/m14544
)
orchiming@gmail.com
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異分母分數減法
兩位數加法
【案例】2013年安徽高考15题
兩位數除以一位數（二）
算柱 (兩位數)
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this is math pic
九點圓
國旗
圈柱(可調整內半徑、外半徑，柱高)
圖形周界_H
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Geometric Transformations
Differential Calculus
Natural Numbers
Limits
Step Functions