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減法
Author:
陳冠彰
Topic:
Subtraction
義守財數101級製作
GeoGebra
New Resources
算柱 (兩位數)
判斷球體
異分母分數減法
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
Discover Resources
範例：畫圈圈的筆
中點軌跡(動點在兩圓上)
弹簧变化
棒形圖2(我最喜愛的科目)
Animation of Refraction
Discover Topics
Right Triangles
Fractal Geometry
Parabola
Volume
Normal Distribution