Если столбиком то так....
4 14/19 - 2 5/19 = 2 9/19
8 7/10 - 5 = 3 7/10
12 - 7/18 = 11 11/18
11 - 3 5/12 = 7 7/12
8 7/15 - 3 11/15 = 5 - 4/15 = 4 11/15
10 9/14 - 3 9/14 = 7
18+2=34-14
18+2>56-50
18+2=70-50
34-14>56-50
70-50=18+2
70-50>56-50
5 5/5 - 2 4/5 =3 1/5
3 1/5 * 3/8=1 1/5
8/5:1/4=6 2/5
- 6 2/5 + 1 1/5 = -5 1/5