3 1/6 + 1 1/8 = 3 3/18 + 1 1/18 = 4 4/18 = 4 2/9
2 3/7 - 1 4/7 = 1 10/7 - 1 4/7 = 6/7
1,3 +1 1/2 = 1,3 + 1,5 = 2,8
2 1/3 - 1/6 = 2 2/6 - 1/6 = 2 1/6
4 5/14 + 1 9/14 = 5 14/14 = 6
5 - 3 2/3 = 4 3/3 - 3 2/3 = 1 1/3
1 5/6 + 1/3 = 1 5/6 + 2/6 = 1 7/6 = 2 1/6
4 1/4 - 2 1/8 = 4 2/8 - 2 1/8 = 2 1/8
2 2/9 - 1 4/9 = 1 11/9 - 1 4/9 = 7/9
3,6 + 2/5 = 3,6 + 0,4 = 4