4-3/7; 4/9+2 5/9-3/8; 3 2/5-4/5+4/15; 9-3 4/5; 6-4 5/6+1 2/3; 4+2 3/4-5 7/8

4 - 3/7 = 3 7/7 - 3/7 = 3 4/7

4/9 + 2 5/9 - 3/8 = 2 9/9 - 3/8 = 3 - 3/8 = 2 8/8 - 3/8 = 2 5/8 = 2,625

3 2/5 - 4/5 + 4/15 = 2 7/5 - 4/5 + 4/15 = 2 3/5 + 4/15 = 2 9/15 + 4/15 = 2 13/15

9 - 3 4/5 = 8 5/5 - 3 4/5 = 5 1/5 = 5,2

6 - 4 5/6 + 1 2/3 = 5 6/6 - 4 5/6 = 1 1/6 + 1 2/3 = 1 1/6 + 1 4/6 = 2 5/6

4 + 2 3/4 - 5 7/8 = 6 3/4 - 5 7/8 = 6 6/8 - 5 7/8 = 5 14/8 - 5 7/8 = 7/8 = 0,875