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部分佔全部的百分率: 例1
Author:
GeoGebra Institute of Hong Kong
Topic:
Percentages
GeoGebra
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四邊形的特性
拼砌四邊形
三位數除以一位數（二）
【案例】2013年安徽高考15题
兩位數除以一位數（一）
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認識時間
會暫停的指針
等腰三角形
第一个绘本
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Polynomial Functions
Trapezoid
Sequences and Series
Parabola
Vectors 2D (Two-Dimensional)