Respostas

2014-05-08T21:05:21-03:00
1 oitavo = 5
3 oitavos = 15 (total de meninas)

total de meninos = 40-15 = 25
2014-05-08T21:07:08-03:00
3/8 . 40 = (40/8) . 3 = 5.3= 15 

40- 15 = 25 meninos na classe.