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ho ting chit
GeoGebra
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兩組對邊相等的四邊形
三位數除以一位數（一）
兩位數除以一位數（二）
四邉形 (四年級) 教師版
第八周作业
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y=a(x-h)²+k
數位學習社
p11-11
數論淺談: 整數解之奧秘
Angles formed by two straight lines and transversal
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Equations
Polygons
Trapezoid
Congruence
Conic Sections