8целых 1/8 - 4 целых 7/10 = 9 - 5 целых 7/10 = 6 целых 1/3 - 4 целых 1/33 = 44,5 - 40 целых 1/16 = 3 целых 7/15 - (2 1/5 + 3 1/2) =

8 1/8 - 4 7/10 = (8 - 4) + (1/8 - 7/10) =
= 4 + (25/200 - 140/200) = 4 - 115/200 = 4 - 23/40 =
= 3 40/40 - 23/40 = 3 17/40,

9 - 5 7/10 = 8 10/10 - 5 7/10 = 3 3/10,

6 1/3 - 4 1/33 = 6 11/33 - 4 1/33 = 2 10/33,

44,5 - 40 1/16 = 44 1/2 - 40 1/16 = 44 8/16 - 40 1/16 = 4 7/16,

3 7/15 - (2 1/5 + 3 1/2) = 
= 3 7/15 - (2 2/10 + 3 5/10) = 
= 3 7/15 - 5 7/10 = 
= 3 14/30 - 5 21/30 = - 2 7/30

перевести простые дроби в десятичные
8.125-4.7=3..42
9-5.7=3.3
6.03-4.03=2
44.5-40.06=4.44
3.46-(2.2+3.5)= -2.24