3 1/8+2 1/12-1/3 : 7,3-0,4*8,5 = 0,99 = 1
1) 3 1/8+1 1/12-1/3 = 25/8+13/12-1/3 = 75/24+26/24-8/24 = 93/24
2) 7,3-0,4*8,5 = 7,3-3,4 = 3,9
3) 93/24: 3,9 =93/24: 3 9/10 = 93/24: 39/10 = 93/24*10/39 = 155/156 = 0,99 = 1
