2-3的相反数是______,3-5的绝对值是______.-数学

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                                             真分数
                               分数{
实数{                                 负分数

                                    正无理数
                  无理数{                      }无限不循环小数
                                    负无理数


(2)按性质分类:
                                                     正整数
                                正有理数{
             正实数{                        正分数
                                正无理数                          

实数{   零                                 负整数
                               负有理数{
             负实数{                       负分数                 
                               负无理数

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