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Copy of 部分佔全部的百分率: 例1
Author:
Keith Ko
,
GeoGebra Institute of Hong Kong
GeoGebra
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異分母分數減法
【案例】2013年安徽高考15题
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
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winter vacation homework 8
Question 9
馬字歌
定积分的概念
QQ空间
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Fractions
Correlation
Triangles
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Isosceles Triangles