Respuestas

2011-12-05T20:33:30+01:00

a) 1/3 + 2/8 + 1/9 = 24/72 + 18/72 + 8/72 = 50/72 = 25/36

b) 2/8 + 1/8 + 1/7 = 14/56 + 7/56 + 8/56 = 29/56