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最簡分數
Author:
李春培
Topic:
Fractions
GeoGebra
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球體建築師
兩位數加法
【案例】2013年安徽高考15题
球体的体积推导（优化版）
畫出對稱圖形
Discover Resources
讀量杯上的刻度
homework3
梯形堆垛
Estimating the Mean
P.5 面積問題02
Discover Topics
Ratios
Combinatorics
Median Value
Linear Equations
Trapezoid