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Author:
acchu
GeoGebra
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算柱 (兩位數)
四邊形的特性
GeoGebra笔记功能体验课件
拼砌四邊形
三位數除以一位數（一）
Discover Resources
昨天各種筆的銷售情況
鸚鵡螺旋線
容量(閱讀不同刻度的量杯)
三角函数变换
三角形三边关系探究习题
Discover Topics
LCM and GCD
Hypergeometric Distribution
Multiplication
Similar Triangles
Fractions