Respuestas

2013-01-06T19:47:18+01:00

aqui t va

   (7/12+7/30)-(7/5-13/15)= (210+84/360)-(21-13/15)=

294/360-8/15= 17/60

2.- 1+29/33-6/22= 66+58-18/66= simplificado es 53/33

3.- (21/2-1/4).(1/6+1/4)= (42-1/4)(2+3/12)=(41/4)(5/12)= 205/48

4.-  (7/8-7/12):(2/3-1/2)= (21-14/24):(4-3/6)= 7/24:1/6= multiplicas en equis  y t sale 7/4

5.- 11+(3/4-11/12):3/2= 11+(9-11/12):3/2= 11+(-1/6):3/2= simplificado 65/9

si no entiendes algo solo m escribes y yo t ayudo