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