Respostas

2014-07-30T11:37:14-03:00
3/5 - 3/5 de 1/3 = 2/5
primeiro achar 3/5 de 1/3
3/5 x 1/3 = 3 /15 = 1/5
3/5 - 1/5 = 2/5
1 5 1
2014-07-30T15:42:15-03:00
3/5-1/3=9-5/15=4/15
2/5 (ao quadrado)simblificado por 2=2/5