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因式分解(十字相乘法)
Author:
Chris Cheng
GeoGebra
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三位數除以一位數（二）
兩位數除以一位數（二）
畫出對稱圖形
兩組對邊相等和有直角的四邊形
錐體建築師
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常態分布和標準差 Normal Distribution and Standard Deviation
How to draw a heptagon with ruler andcomp…
Example 2
兩位數除三位數(商<10)
Introduction to Rectangular Coordinates
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Arithmetic Operations
Standard Deviation
Fractions
Isosceles Triangles
Plane Figures or Shapes