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計算減法
Author:
tommy.chan
Topic:
Subtraction
GeoGebra
New Resources
兩位數加法
兩組對邊相等和有直角的四邊形
近似值：有效數字
找出對稱軸
三位數除以一位數（一）
Discover Resources
Homework3
angle
數軸
三角形外心的位置
新手任务绘本
Discover Topics
Prism
Median Value
Fractal Geometry
Correlation
Frequency Distribution