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七巧板
Author:
Tse Sir
GeoGebra
New Resources
異分母分數減法
畫出對稱圖形
【案例】2013年安徽高考15题
兩位數除以一位數（一）
兩位數加法
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方格紙上畫正方形3
【基測數學94v1 單選31】圓的組合面積
圓與正三角形上動點連線上中點的軌跡
ikik
矩形性质推论
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Random Variables
Random Experiments
Mode
Fractions
Tangent Line or Tangent