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Author:
呂麗珠
GeoGebra
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異分母分數減法
垂直線的斜率
兩位數除以一位數（二）
兩位數加法
祖冲之的期望：内棋与外棋
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拿破崙三角形
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zztest
圖解畢氏定理
平移中心
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Mathematics
Function Graph
Combinatorics
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