→ Soma e Subtração: vírgula abaixo de vírgula, podendo complementar os espaço faltoso com zero.

ex:  0,0247 + 0,8                                      ↔                                   ex: 17,14 − 1,28

        0,0247                                                                                           17,14

 +     0,8000                                                                                      −   01,28

        0,8247                                                                                           15,86