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國旗腳踏車
Author:
Tone
GeoGebra
New Resources
兩位數加法
異分母分數減法
找出對稱軸
三位數除以一位數（二）
球體建築師
Discover Resources
Addition and Subtraction of Directed Numbers (1) 有向數加減(1)
World's Hardest Easy Geometry Problem.
課堂工作紙(一)
面積
拋物線6 包絡線法
Discover Topics
Curve Sketching
Subtraction
Similarity Transformation or Similarity
Kite
Histogram