21 terms

Teen subtraction

STUDY
PLAY
18-9
9
17-9
8
17-8
9
16-8
8
16-9
7
16-7
9
15-6
9
15-9
6
15-7
8
15-8
7
14-9
5
14-5
9
14-7
7
14-8
6
14-6
8
13-4
9
13-8
5
13-9
4
13-5
8
13-7
6
13-6
7
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