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分數加法和減法
Author:
Samsam
GeoGebra
New Resources
兩位數除以一位數（一）
平行線的斜率
球体的体积推导
第八周作业
垂直線的斜率
Discover Resources
cos, sin 與單位圓
S5 geometry
青字歌
Copy of 劉徽的「割圓術」
大樓仰角皆為 60 度
Discover Topics
Intersection
Scatter Plot
Random Variables
Statistics
Division