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計算減法
Author:
tommy.chan
Topic:
Subtraction
GeoGebra
New Resources
算柱 (兩位數)
拼砌四邊形
兩位數加法
第八周作业
三位數除以一位數（二）
Discover Resources
扇形面積
中垂線性質
外擺線
菱形
乘方
Discover Topics
Algebra
Geometric Mean
Scalene Triangles
General Quadrilateral
Diagrams