18 - 5 = _____
13
11 - 3 = _____
8
15 - 4 = _____
11
13 - 4 = ____
9
20 - 5 = _____
15
15 - 8 = ____
7
12 - 5 = ____
7
14 - 9 = _____
5
11 - 6 = _____
5
17 - 5 = ____
12
17 - 9 =
8
18 - 10 = ____
8