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