Respuestas

2012-03-16T17:27:00+01:00

(3/7 : 2/4) + (1/2 - 1/3) = (3/7 x 4/2) + ( 3/6 - 2/6) = 

= 12/14 + 1/6 = 6/7 + 1/6 = 36/42 + 7/42 = 43/42 = 1 1/42