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比和比值
Author:
李春培
比和比值
GeoGebra
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三位數除以一位數（一）
兩組對邊相等的四邊形
【案例】2013年安徽高考15题
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
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比和比值
Addition and Subtraction of Directed Numbers (1) 有向數加減(1)
gjc102a19 三角形的對折
Congruent and Similarity
折線運動1
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Intersection
Definite Integral
Angles
Means
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