Question

помогите : а)(7/15 + 7/30 + 4/5 ) : ( 2 - 1/3 - 1/2) б) (1/6 + 1/10 + 1/15) : (3/5 + 1/3 - 1/4)

Answer 1

а)(14/30+7/30+24/30):(12/6-2/6-3/6)

    45/30:7/6

     45/30*6/7=45/35=45/35=9/7=1 2/7

 

б)(10/60+6/60+4/60):(9/15+5/15-1/4)

   20/60:(14/15-1/4)

   20/60:29/60

   20/60*60/29=20/29