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michelle82100
GeoGebra
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異分母分數減法
【案例】2013年安徽高考15题
柱體建築師
兩位數除以一位數（二）
拼砌四邊形
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文氏圖
分數的加法
固定三角形的條件−題3
I am superman
複合圖形
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Rational Numbers
Inequalities
Linear Programming or Linear Optimization
Integers
Numbers