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

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