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數學傳播39卷4期, 平面幾何公式思考
Author:
Yu-Tuan Lin
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畫出對稱圖形
算柱 (兩位數)
第八周作业
柱體建築師
兩位數加法
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If x^2 + x + k > 0 for any real value of x, what is k?
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密鋪2
我的第一个GGB绘本
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Quadratic Functions
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