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分數認識
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lkkbmaths teachers 檔案儲存用
GeoGebra
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算柱 (兩位數)
兩位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
【案例】2013年安徽高考15题
判斷球體
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test1
量角器
ghseh 二次函數的開口方向
AMC
楼梯
Discover Topics
Vectors 2D (Two-Dimensional)
Polygons
Orthocenter
Definite Integral
Trigonometry