| 1) | 8 - -3 - 4 | 2) | -5 + 2 + -1 |
| 3) | -9 - -6 - 21 | 4) | -3 + 1 - -15 |
| 5) | 14 - -8 - -5 | 6) | 12 - -8 - 5 |
| 7) | 13 + 7 + -5 | 8) | -6 + 10 + 5 |
| 9) | 2 + 1 - 2 | 10) | -1 - -2 - -19 |
| 11) | 7 - -9 - -20 | 12) | -10 - -10 - 9 |
| 13) | -3 - -2 - -21 | 14) | -5 + 7 + -16 |
| 15) | 10 - -4 - 11 | 16) | 5 - -10 - 9 |
| 17) | -6 + 2 + -24 | 18) | -10 + 8 + 15 |
| 19) | -7 + 9 + 0 | 20) | 10 - -1 + -5 |
| 21) | -3 - -8 - -21 | 22) | -2 - -4 - -15 |
| 23) | -7 + 2 + -14 | 24) | 4 - -7 - -10 |
| 25) | 2 + 5 + 4 | 26) | 11 + 3 + -3 |
| 27) | 2 - -1 + 20 | 28) | 7 + 9 + 19 |
| 29) | -8 - -3 - -9 | 30) | 3 - -8 - 16 |
| 31) | -11 + 7 + -5 | 32) | -11 - -2 - -15 |
| 33) | 12 + 7 + -22 | 34) | -8 - -3 - 10 |
| 35) | -8 - -4 - -19 | 36) | -12 - -9 - -11 |
| 37) | 4 - -9 - 5 | 38) | 7 - -6 - -18 |
| 39) | 1 - -7 - 13 | 40) | -7 - -9 - 6 |
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!