Question

How to add it because I don not know how to do it

Answer 1

   1              3            4
1 --    +    1 --   =    2 --
   5              5            5

Explanation:

1 + 1 = 2
1/5 + 3/5 = 4/5

Answer 2

1 + 3 = 4 1+1 = 2      the answer is 2 4/5