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Mathin
Entry065Stage 3 · Grades 5–6图形与几何

用数对确定位置

第几列、第几行——两个数锁定一个位置。

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Definition

教室里「第 3 列第 2 排」写成数对 (3,2)(3,2)——两个数、约定好顺序,就能唯一确定平面上的位置。棋盘、地图、屏幕坐标,都是同一个想法。

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