Respuesta :

olemakpadu
    6    4
   +
     4    3
     _____ 
   1  0    7
   ______


3 + 4 = 7      Put down the 7.

6 + 4  = 10    Put down the 0 first, and then 1 is left.  Put down the 1 also to the extreme left.

So the answer is    107