9 is 1 and 8

9 is 2 and 7

9 is 3 and 6

9 is 4 and 5

9 is 5 and 4

9 is 6 and 3

9 is 7 and 2

9 is 8 and 1

8 TAKE AWAY 3 LEAVES 5

9 TAKE AWAY 4 LEAVES 5

12 TAKE AWAY 5 LEAVES 7

6 MINUS 2 REMAINS 4

10 MINUS 4 REMAINS 6

13 MINUS 8 REMAINS 5