一从学生原有的认知结构提出问题 1.什么是正负数 2.如何用正负数表示具有相反意义的量数0表示量的意义是什么举例说明. 3 Template




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tomski一从学生原有的认知结构提出问题 1.什么是正负数 2.如何用正负数表示具有相反意义的量数0表示量的意义是什么举例说明. coloring