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蜘蛛網
Author:
許清惟
GeoGebra
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兩位數除以一位數（二）
第八周作业
畫出對稱圖形
【案例】圆柱体内放置一个大球六个小球
異分母分數減法
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waaachen
Building Pyramids 建造角錐體
周界
比較圖形大小3
中國火柴遊戲二
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Differential Calculus
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Pyramid
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