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Author:
cktsang
permutation (chi. ver.)
GeoGebra
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畫出對稱圖形
画直线等分三角形的面积
兩位數加法
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
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幾何鋪磚 3, 4, 6 邊形
線性組合性質
平移指令
選修數學
异形操场
Discover Topics
Rotation
Step Functions
Arithmetic
Algebra
Interest Calculation