Subtracting Mixed Numbers

Question 1:

5 3 7 - 4 4 9
62 63

Question 2:

5 1 10 - 4 3 5
5 10 = 1 2

Question 3:

5 7 8 - 1 5 6
97 24 = 4 1 24

Question 4:

3 2 3 - 2 3 5
16 15 = 1 1 15