Subtracting Mixed Numbers

Question 1:

1 3 8 - 1 1 6
5 24

Question 2:

5 4 7 - 2 1 6
143 42 = 3 17 42

Question 3:

5 5 6 - 4 9 10
28 30 = 14 15

Question 4:

4 1 2 - 3 2 3
5 6