я не понимаю эти примеры 1) (5/12+1/8): 3/8= 2) 5/12+1/8: 3/8= 3) 2ц 6/7: (5/6-9/14)= 4)2ц 6/7: 5/6-9/14=

1) (5/12+1/8):3/8= (10/24+3/24)*8/3= 13/24*8/3=13/3*1/3=13/9=1 4/9
2) 5/12+1/8:3/8=5/12+1/8*8/3=5/12+1/3=5/12+4/12=9/12=3/4=0,75
3) 2 6/7:(5/6-9/14)=20/7:(35/42-27/42)=20/7:8/42=20/7:4/21=20/7*21/4=
   =5/7*21/1=5/1*3/1=15
4)2 6/7:5/6-9/14=20/7*6/5-9/14=4/7*6/1-9/14=24/7-9/14=48/14-9/14=39/14=
  =2 11/14