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