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11-18的加減組合
Author:
Yin Kelvin Wong
GeoGebra
New Resources
【案例】2013年安徽高考15题
異分母分數減法
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
四邉形 (四年級) 教師版
Discover Resources
Ambiguous Cylinder illusion
gjh-h04-01 多個堆疊的直角三角形
intersection: surface-surface, curve-curve
Pappus Chain
垂心
Discover Topics
Scatter Plot
Ratios
Scalene Triangles
Secant Line or Secant
Calculus