Respuestas

2013-09-15T20:58:23+02:00

20/40 + 75/5 = 20/40 + 600/40 = 620/40 = 62/4 = 31/2 = 15 1/2
13/13 + 39/13 = 52/13 = 4
15/16 - 3/8 = 15/16 - 6/16 = 9/16
3/4 - 3/8 = 6/8 - 3/8 = 3/8
8/3 - 5/15 = 40/15 - 5/15 = 35/15 = 7/3 = 2 1/3
16/12 + 4/60 = 80/60 + 4/60 = 84/60 = 42/30 = 21/15 = 7/5 = 1 2/5
2/3 + 5/4 = 8/12 + 15/12 = 23/12
1/5 + 1/15 = 3/15 + 1/15 = 4/15