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q5-9
Author:
johnmayhk
GeoGebra
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三位數除以一位數（二）
畫出對稱圖形
第八周作业
兩位數加法
近似值：有效數字
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高美溼地
數據分析（1）
How to draw a heptagon with ruler andcomp…
我的傑作
水流問題(黑板)
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Algebra
Natural Numbers
Optimization Problems
Distributions
Equilateral Triangles