Representação geométrica dos números inteiros

We can represent integers in a reta.Usando the same unit of length, pointed to the right of the origin consecutive points and for each point, we match an integer positivo.Assim:


  ___________________ | __________________________
              0 +1 +2 +3 +4 +5


Note: Zero is always the origin of the line




We repeat this procedure for points located to the left of the origin, which do match the negative integers.


________ | __________________
      0 +1 +2 +3 +4 +5



We can meet in a single number line the positive integers and negativos.Essa line is called full number line.



_______________________________________________________________
                         -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5


                                   negative towards positive direction