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GeoGebra
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錐體建築師
兩位數加法
【案例】2013年安徽高考15题
找出對稱軸
第八周作业
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分數乘法_李樂雯
伸展收縮變換
银币
Rolling Square
Twghmkc_時鐘
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Logic
Arithmetic Operations
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Cosine