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Stack 8 Fact Fam +-

QuestionAnswer
8+8 8+8=16
16-8 16-8=8
8+9 8+9=17
9+8 9+8=17
17-8 17-8=9
17-9 17-9=8
8+10 8+10=18
10+8 10+8=18
18-8 18-8=10
18-10 18-10=8
8+11 8+11=19
11+8 11+8=19
19-8 19-8=11
19-11 19-11=8
8+12 8+12=20
12+8 12+8=20
20-8 20-8=12
20-12 20-12=8
Created by: dmahoney
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