Write the answers to the subtraction questions below (the first one is done for you).
16 - 7 = 9
16 - 8 = 8
15 - 7 = 8
19 - 9 = 10
15 - 6 = 9
11 - 9 = 2
18 - 9 = 9
14 - 7 = 7
13 - 7 = 6
12 - 5 = 7
12 - 7 = 5
16 - 9 = 7
19 - 8 = 11
17 - 5 = 12
11 - 3 = 8
10 - 3 = 7
13 - 8 = 5
14 - 9 = 5
10 - 4 = 6
15 - 8 = 7
11 - 5 = 6