Subtracting Mixed Numbers

Question 1:

3 3 5 - 2 1 6
43 30 = 1 13 30

Question 2:

5 4 5 - 3 1 9
121 45 = 2 31 45

Question 3:

4 4 9 - 1 1 10
301 90 = 3 31 90

Question 4:

5 3 5 - 3 7 8
69 40 = 1 29 40