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版本5
Author:
zbzhen
GeoGebra
New Resources
錐體建築師
兩位數加法
找出對稱軸
三位數除以一位數（一）
畫出對稱圖形
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以反演看 n 次方根
龍騰4_1-1課進9
IMO2015C
解題一
Copy of 随机模拟实验（撒豆子估算π）
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Percentages
Sine
Upper and Lower Sum or Riemann Sum
Curve Sketching
Calculus