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密鋪
Author:
chen mingchuan
GeoGebra
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兩位數除以一位數（一）
【案例】2013年安徽高考15题
球体的体积推导
兩位數加法
球體建築師
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畫三角形 題1e
telling the time
優良作品1
均分除法（整數÷整數）
百分數與分數
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Trigonometric Functions
Integral Calculus
Percentages
Tangent Line or Tangent
Differential Calculus