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梯形面積(求上底)
Author:
lkkbmaths teachers 檔案儲存用
GeoGebra
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四邊形的特性
三位數除以一位數（一）
兩位數加法
画直线等分三角形的面积
GeoGebra笔记功能体验课件
Discover Resources
Rotational Symmetry
testing
星星
包含除法（整數÷整數）的副本
中考数学16讲
Discover Topics
Equations
Tree Diagrams
Intersection
Optimization Problems
Vectors 2D (Two-Dimensional)