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