(1,25 + 5/6) : 8 1/3
--------------------------------- - 3.7 * 4.2
(1/12+1/15 - 0.05) : 0,2

1,25=1 1 /41 1/4+5/6=1 13/12=2 1/128 1/3=25/325/12:25/3=1/4=0,251/12+1/15=3/20=0,150,15-0,05=0,100,10:0,2=0,50,25:0,5=0,5=1/21/2-3/7=1/141/14*4 2/10=0,3