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Stack 4 Fact Fam +-

QuestionAnswer
4+4 4+4=8
8-4 8-4=4
4+5 4+5=9
5+4 5+4=9
9-4 9-4=5
9-5 9-5=4
4+6 4+6=10
6+4 6+4=10
10-4 10-4=6
10-6 10-6=4
4+7 4+7=11
7+4 7+4=11
11-4 11-4=7
11-7 11-7=4
4+8 4+8=12
8+4 8+4=12
12-4 12-4=8
12-8 12-8=4
4+9 4+9=13
9+4 9+4=13
13-4 13-4=9
13-9 13-9=4
4+10 4+10=14
10+4 10+4=14
14-4 14-4=10
14-10 14-10=4
4+11 4+11=15
11+4 11+4=15
4+12 4+12=16
12+4 12+4=16
16-4 16-4=12
16-12 16-12=4
15-11 15-11=4
15-4 15-4=11
Created by: dmahoney
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