Respostas

2014-08-06T17:29:13-03:00
4. 3,30 = 13,2
3. 5,25 = 15, 75
10 - 7 = 3
3. 4,45 = 13,35
13,20 + 15,75 + 13,35 = 42,3
R: 42min 30 seg