| 7. | Some of the possible solutions are - |
| 12 + 3 + 4 + 5 - 6 - 7 + 89 |
| 1 + 23 - 4 + 56 + 7 + 8 + 9 |
| 1 + 2 + 34 - 5 + 67 - 8 + 9 |
| 1 + 2 + 3 - 4 + 5 + 6 + 78 + 9 |
| 123 + 45 - 67 + 8 - 9 |
| 123 - 45 - 67 + 89 |
| 8. | 65 |
| 9. | Area of lawn was 186.51 square metres (to 2 d.p.)
|