4/3+1/8: 5/11
6/2*1/4: 3/5
1/7*2/3-4/5: 1/2
1/6-2/7: 3/8+4/5

4/3+1/8*11/5=4/3+11/40=160/120+33/120=193/120=1целая 73/120

6/2*1/4*5/3=5/4=1целая 1/4=1,25

1/7*2/3-4/5*2/1=2/21-8/5=10/105+168/105=178/105=1целая 73/105

1/6-2/7*8/3+4/5=1/6-16/21+4/5=105/630-480/630+504/630=129/630=43/210