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放缩尺
Author:
萧若茂
放缩尺
GeoGebra
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三位數除以一位數（一）
異分母分數減法
【案例】2018年全国1卷理科12题
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
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格子點問題
达布和
鉛筆畫圓
餘弦公式2
Copy of 幾何分布 (Geometric Distribution)
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Trapezoid
Difference and Slope
Stochastic Process or Random Process
Perimeter
Centroid or Barycenter