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