Subtraction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 15 | 20 | 25 | 30 | 40 | 50 |
1 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 14 | 19 | 24 | 29 | 39 | 49 |
2 | -1 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 13 | 18 | 23 | 28 | 38 | 48 |
3 | -2 | -1 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 12 | 17 | 22 | 27 | 37 | 47 |
4 | -3 | -2 | -1 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 11 | 16 | 21 | 26 | 36 | 46 |
5 | -4 | -3 | -2 | -1 | 0 | 1 | 2 | 3 | 4 | 5 | 10 | 15 | 20 | 25 | 35 | 45 |
6 | -5 | -4 | -3 | -2 | -1 | 0 | 1 | 2 | 3 | 4 | 9 | 14 | 19 | 24 | 34 | 44 |
7 | -6 | -5 | -4 | -3 | -2 | -1 | 0 | 1 | 2 | 3 | 8 | 13 | 18 | 23 | 33 | 43 |
8 | -7 | -6 | -5 | -4 | -3 | -2 | -1 | 0 | 1 | 2 | 7 | 12 | 17 | 22 | 32 | 42 |
9 | -8 | -7 | -6 | -5 | -4 | -3 | -2 | -1 | 0 | 1 | 6 | 11 | 16 | 21 | 31 | 41 |
10 | -9 | -8 | -7 | -6 | -5 | -4 | -3 | -2 | -1 | 0 | 5 | 10 | 15 | 20 | 30 | 40 |
15 | -14 | -13 | -12 | -11 | -10 | -9 | -8 | -7 | -6 | -5 | 0 | 5 | 10 | 15 | 25 | 35 |
20 | -19 | -18 | -17 | -16 | -15 | -14 | -13 | -12 | -11 | -10 | -5 | 0 | 5 | 10 | 20 | 30 |
25 | -24 | -23 | -22 | -21 | -20 | -19 | -18 | -17 | -16 | -15 | -10 | -5 | 0 | 5 | 15 | 25 |
30 | -29 | -28 | -27 | -26 | -25 | -24 | -23 | -22 | -21 | -20 | -15 | -10 | -5 | 0 | 10 | 20 |
40 | -39 | -38 | -37 | -36 | -35 | -34 | -33 | -32 | -31 | -30 | -25 | -20 | -15 | -10 | 0 | 10 |
50 | -49 | -48 | -47 | -46 | -45 | -44 | -43 | -42 | -41 | -40 | -35 | -30 | -25 | -20 | -10 | 0 |