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Author:
李春培
國道收費.
GeoGebra
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三位數除以一位數（一）
柱體建築師
拼砌四邊形
sanjiaohanshu
算柱 (兩位數)
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認識正方形
牛頓法 (Newton's Method)
test04
圆锥的侧面展开图3D
六芒星
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Rectangle
LCM and GCD
Definite Integral
Congruence
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