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Author:
陈铁成
GeoGebra
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兩位數加法
三位數除以一位數（一）
【案例】2018年全国1卷理科12题
算柱 (兩位數)
異分母分數減法
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圓形,三角形軌跡觀察
思考題
GGB3
讀磅
展開圓面積 (講義版)的副本
Discover Topics
Linear Functions
Vectors
Centroid or Barycenter
Quadratic Equations
Piecewise Functions