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一个桶八个球
Author:
孟宝兴
GeoGebra
New Resources
算柱 (兩位數)
第八周作业
三位數除以一位數（一）
兩組對邊相等的四邊形
判斷球體
Discover Resources
directed number_hot air balloon
tool1
向外延伸的多邊形
長方體動態展開圖
正方形纸片剪出正三角形（顶点在边上）
Discover Topics
Trigonometry
Rational Numbers
Arithmetic Operations
Scalene Triangles
Limits