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Ex.1
Author:
johnmayhk
GeoGebra
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四邉形 (四年級) 教師版
錐體建築師
兩位數加法
異分母分數減法
三位數除以一位數（二）
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Introduction to Rectangular Coordinates 直角坐標簡介
優良作品3(昀潔)
glt-h02-00-正方形折成三角錐
禪繞畫
放射狀圖形(1)
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Numbers
Planes
Rectangle
Pyramid
Arithmetic