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Meaning of dy/dx
Author:
johnmayhk
GeoGebra
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異分母分數減法
【案例】2018年全国1卷理科12题
拼砌四邊形
兩位數加法
三位數除以一位數（二）
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Area of rectangle
PMC 2014-15 ans
asqSQ
長方體的切割(二)
學習單：三角形外切圓作法
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Area
Plane Figures or Shapes
Congruence
Polygons
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