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