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原创 不花钱早教启蒙|Number Lines数轴主题资源汇总
在数学中,可以用一条直线上的点表示数,这条直线 叫做数轴(number line),它满足以下要求: (1)在直线上任取一个点表示0这个点叫做原点(origin); (2)通常规定直线上从原点向右(或上)为正方向,从原点向左(或下)为负方向; (3)选取适当的长度 ...
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