Respuestas

2011-12-21T06:03:03+01:00

(2/10 + 11/10) : 6/10=

(13/10): 6/10=

13/10 x 10/6 =13/6

 

(4/10 - 1/4) - 1 =

(2/5 - 1/4) - 1=

13/20 - 1= -7/20