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Author:
李春培
I love you
GeoGebra
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四邊形的特性
兩位數除以一位數（一）
異分母分數減法
兩組對邊相等和有直角的四邊形
第八周作业
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畫三角形 題1b
二次函数的图像
Area
随机数表
拖拉小正方体
Discover Topics
Fractions
Similarity Transformation or Similarity
Variance
Addition
Similar Triangles