Respuestas

2012-09-25T03:29:17+02:00

(3/4) + (2/5)+ (1/2) :::::::   mcm (minimo comun multiplo del denominador

 

mcm 4 , 5 , 2 = 20

 

(15+8+10)/20 =   33/20

2012-09-25T03:29:49+02:00

 3/4 + 2/5 + 1/2=(15 + 8 + 10)/20=33/20