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

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