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若隐若现的白点
Author:
许业成
GeoGebra
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【案例】2013年安徽高考15题
兩位數除以一位數(二)
三位數除以一位數(二)
四邉形 (四年級) 教師版
算柱 (兩位數)
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Visualizing a System of Linear Equations
test
點到直線的距離 8:觀察平行線常數項的差距
扇形滚动(圆心角半径可变)
微分量 (Differentials)
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Conic Sections
Triangles
Percentages
Indefinite Integral
Similar Triangles