Respuestas

2012-10-26T16:33:32+02:00

2/5 - 1/10  = 15/50    

 

1/5 - 2/10 = 50 

2012-10-26T17:33:49+02:00

si no me equivoco sale mas o menos asii

2/5 - 1/10  = 15/50    

 

1/5 - 2/10 = 50