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