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顏色錯覺：灰色的草莓 練習
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学用数学
GeoGebra
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三位數除以一位數（一）
GeoGebra笔记功能体验课件
算柱 (兩位數)
【案例】2013年安徽高考15题
兩位數加法
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正七邊形2
圓錐曲線的線性變換
作業3-1 增加互動功能
分數認識
分割平行四邊形長方形
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Arithmetic
Quadratic Equations
Subtraction
Sequences and Series
Fractions