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Author:
lee chao ming
GeoGebra
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異分母分數減法
三位數除以一位數（二）
算柱 (兩位數)
球體建築師
兩組對邊相等和有直角的四邊形
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數學作業
等線段作圖
切割正二十面體
Copy of 分數與小數
圆柱展开成平行四边形2
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Distributions
Diagrams
Inequalities
Linear Programming or Linear Optimization
Frequency Distribution