Subtraction of Integers
| Problem | Minuend | Subtrahend | Difference |
| 1 | 88 | 88 | 0 |
| 2 | 4500 | 338 | 4162 |
| 3 | 47 | 29 | 18 |
| 4 | 7700 | 544 | 7156 |
| 5 | 231 | 75 | 156 |
| 6 | 82 | 66 | 16 |
| 7 | 9502 | 505 | 8997 |
| 8 | 6103 | 897 | 5206 |
| 9 | 277 | 59 | 218 |
| 10 | 75 | 28 | 47 |
| 11 | 1403 | 833 | 570 |
| 12 | 41 | 11 | 30 |
| 13 | 83 | 82 | 1 |
| 14 | 84 | 58 | 26 |
| 15 | 6700 | 723 | 5977 |
| 16 | 65 | 47 | 18 |
| 17 | 5401 | 888 | 4513 |
| 18 | 813 | 64 | 749 |
| 19 | 86 | 85 | 1 |
| 20 | 31 | 17 | 14 |
| 21 | 5303 | 459 | 4844 |
| 22 | 422 | 38 | 384 |
| 23 | 5900 | 779 | 5121 |
| 24 | 7100 | 739 | 6361 |
| 25 | 486 | 58 | 428 |
| 26 | 81 | 66 | 15 |
| 27 | 84 | 47 | 37 |
| 28 | 6200 | 421 | 5779 |
| 29 | 373 | 95 | 278 |
| 30 | 9002 | 478 | 8524 |
| 31 | 871 | 36 | 835 |
| 32 | 91 | 84 | 7 |
| 33 | 582 | 44 | 538 |
| 34 | 83 | 75 | 8 |
| 35 | 2203 | 118 | 2085 |
| 36 | 7400 | 771 | 6629 |
| 37 | 813 | 44 | 769 |
| 38 | 7508 | 859 | 6649 |
| 39 | 493 | 74 | 419 |
| 40 | 2800 | 636 | 2164 |
| 41 | 8400 | 984 | 7416 |
| 42 | 97 | 18 | 79 |
| 43 | 452 | 96 | 356 |
| 44 | 36 | 26 | 10 |
| 45 | 88 | 28 | 60 |
| 46 | 4800 | 956 | 3844 |
| 47 | 41 | 22 | 19 |
| 48 | 84 | 19 | 65 |
| 49 | 8500 | 566 | 7934 |
| 50 | 7301 | 109 | 7192 |