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加法
Author:
Cobie Lo
Topic:
Addition
GeoGebra
New Resources
兩位數加法
四邊形的特性
錐體建築師
兩位數除以一位數（二）
直角坐標平面上的旋轉變換
Discover Resources
翰林B4課p227_9
Locus (Two points 1)
梯形面積 Area of Trapezium
扇形在射线上滚动
正切线生成函数图像
Discover Topics
Histogram
Circle
Complex Numbers
Diagrams
Triangles