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11-18的加減組合
Author:
Yin Kelvin Wong
GeoGebra
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兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
異分母分數減法
判斷球體
【案例】2013年安徽高考15题
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三角函數的疊合
優良作品4(薇如)
q5-8
第6题
勝者即正義
Discover Topics
Subtraction
Surface
Isosceles Triangles
Linear Functions
Frequency Distribution