1.	8 - 5 = 3	11 - 3 = 8	7 - 3 = 4	13 - 6 = 7	8 - 5 = 3
2.	10 - 2 = 8	10 - 3 = 7	4 - 3 = 1	11 - 2 = 9	4 - 0 = 4
3.	9 - 8 = 1	14 - 9 = 5	6 - 0 = 6	13 - 5 = 8	14 - 7 = 7
4.	18 - 9 = 9	10 - 5 = 5	14 - 5 = 9	9 - 9 = 0	12 - 9 = 3
5.	13 - 5 = 8	6 - 2 = 4	2 - 1 = 1	6 - 3 = 3	6 - 5 = 1
6.	7 - 5 = 2	3 - 0 = 3	13 - 8 = 5	1 - 0 = 1	9 - 7 = 2
7.	12 - 4 = 8	4 - 4 = 0	9 - 4 = 5	15 - 7 = 8	6 - 3 = 3
8.	7 - 1 = 6	12 - 9 = 3	8 - 6 = 2	15 - 9 = 6	8 - 1 = 7
9.	7 - 3 = 4	5 - 5 = 0	10 - 6 = 4	10 - 5 = 5	3 - 2 = 1
10.	7 - 1 = 6	6 - 1 = 5	11 - 3 = 8	5 - 3 = 2	12 - 5 = 7
11.	9 - 8 = 1	5 - 1 = 4	9 - 6 = 3	12 - 3 = 9	15 - 6 = 9
12.	9 - 4 = 5	8 - 7 = 1	8 - 4 = 4	17 - 8 = 9	2 - 1 = 1
13.	13 - 4 = 9	9 - 3 = 6	4 - 2 = 2	4 - 1 = 3	5 - 0 = 5
14.	15 - 8 = 7	11 - 6 = 5	10 - 1 = 9	12 - 6 = 6	5 - 3 = 2
15.	12 - 3 = 9	6 - 4 = 2	4 - 3 = 1	16 - 8 = 8	9 - 3 = 6
16.	9 - 6 = 3	11 - 9 = 2	16 - 9 = 7	10 - 3 = 7	16 - 8 = 8
17.	11 - 6 = 5	13 - 9 = 4	9 - 2 = 7	11 - 8 = 3	14 - 9 = 5
18.	11 - 5 = 6	7 - 2 = 5	3 - 1 = 2	13 - 7 = 6	6 - 4 = 2
19.	14 - 8 = 6	12 - 4 = 8	7 - 4 = 3	8 - 2 = 6	8 - 3 = 5
20.	10 - 8 = 2	8 - 7 = 1	9 - 5 = 4	8 - 0 = 8	14 - 5 = 9

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