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lkkbmaths teachers 檔案儲存用
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兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
算柱 (兩位數)
異分母分數減法
兩位數加法
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立體圖形的旋轉對稱
方塊圖(平均)
三視圖01
QQ空间
擲兩個硬幣的機率分布的副本
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Mathematics
Subtraction
Logic
Geometry
Upper and Lower Sum or Riemann Sum