| 1) | -4 - -3 - 13 | 2) | -4 + 3 + -11 |
| 3) | -4 + 8 + -9 | 4) | 8 - -5 - 9 |
| 5) | 2 + 7 + 12 | 6) | 2 - -3 - 5 |
| 7) | 14 - -6 - -12 | 8) | -12 - -1 + 3 |
| 9) | -3 - -7 - 23 | 10) | -8 + 3 + 0 |
| 11) | 11 + 8 + 23 | 12) | 11 - -10 - -17 |
| 13) | 3 + 3 + -10 | 14) | 2 + 8 + 16 |
| 15) | -3 - -1 + 20 | 16) | -6 + 4 + -15 |
| 17) | 10 - -10 - 2 | 18) | 3 - -3 - -2 |
| 19) | -5 - -2 - 2 | 20) | 7 + 1 - 3 |
| 21) | 5 + 4 + 2 | 22) | -3 - -9 - 19 |
| 23) | -9 + 8 + 9 | 24) | 7 - -8 - 7 |
| 25) | -1 - -10 - 15 | 26) | -10 - -10 - 16 |
| 27) | -10 - -9 - -14 | 28) | 9 + 3 + 18 |
| 29) | -8 - -7 - -24 | 30) | 3 - -3 - 22 |
| 31) | 1 + 10 + -7 | 32) | -4 + 1 - -1 |
| 33) | -1 - -3 - -19 | 34) | 2 - -10 - 8 |
| 35) | 6 + 3 + 15 | 36) | -9 - -1 + -15 |
| 37) | -11 - -3 - 11 | 38) | 12 + 2 + 24 |
| 39) | -9 + 3 + -13 | 40) | 11 + 2 + -7 |
Joke:
If your father was a mathematician, he would warn you in the form of 'I told you n times; and I told you n+1 times' and so on!