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S9G8 歐洲地圖 0530
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学用数学
GeoGebra
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Fibonacci Clock
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「相似三角形」任务4
整數或分數÷分數_ 工作紙（一）_題2c
Problem1:(md+me+mf)/(ad+be+cf)=a
分数加法 Fraction Addition
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Exponent
Coordinates
Function Graph
Rectangle
Linear Functions