Respuestas

2014-02-28T22:11:58+01:00
Hola,
a) 
16/12 = 4/3
17/34 = 1/2

4/3 + 1/2 = (8 + 3)/ 6 = 11/6

b)
19/24 - 12/24
(19-12) / 24 = 7/24