Question

把下列各數(shù)填入相應(yīng)的集合中

，，＋13.5，，3.14，，，，0，＋5，

2.1010010001…, ，  

①正數(shù)集合         {                                                                                                …}

②負(fù)數(shù)集合         {                                                                                                …}

③無(wú)理數(shù)集合     {                                                                                                …}

④整數(shù)集合       {                                                                                                …}

⑤分?jǐn)?shù)集合      {                                                                                                …}

Answer 1

①正數(shù)集合       {，＋13.5，3.14， ，＋5，2.1010010001…,               …}

②負(fù)數(shù)集合         {， ， ， ， ， …}

③無(wú)理數(shù)集合     { 2.1010010001…, ，                                                           …}

④整數(shù)集合       {，0，＋5，                                                   …}

⑤分?jǐn)?shù)集合     {，＋13.5，，3.14，，，， …}