Respostas

2014-08-26T21:12:33-03:00
5/6-1/5= 25/30-6/30=19/30
19/30-1/3=19/30-10/30=9/30
9/30 :3/2=
9/30 x 2/3=
18/90 - simplifico por 18= 1/5