Respuestas

2012-11-23T03:32:25+01:00

2/5 - 5/10=

2/5 - 1/2=

(2*2-1*5)/10=

(4-5)/10= -1/10

2012-11-23T03:32:41+01:00

saca mcm

 

10

 

 

(4-5)/10=-1/10