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相反數
Author:
pingfeng.wu
Topic:
Fractions
國中數學7上：相反數
GeoGebra
New Resources
找出對稱軸
兩組對邊相等和有直角的四邊形
判斷球體
画直线等分三角形的面积
兩位數除以一位數（二）
Discover Resources
平行四邊形面積一
Parabola_Horizontal
九九乘法表
比一比看谁小
任意角
Discover Topics
Real Numbers
Median Value
Step Functions
Linear Equations
Tangent Line or Tangent