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Quiz on Addition and Subtraction of Directed Numbers (2) 有向數加減測驗(2)
Author:
Alex CHIK
Topic:
Numbers
GeoGebra
gMath 互動數學教室
http://www.geogebra.hk
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球體建築師
【案例】圆柱体内放置一个大球六个小球
画直线等分三角形的面积
兩位數除以一位數(二)
兩位數除以一位數(一)
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