1.  = |
2. + +  = |
| 3. + + + = |
| 4. + = |
| 5. + + + = |
| 1. 1, , 3, , 5, . |
| 2. 10, 20, , 40, , , 70. |
| 3. 5, , 9, , 13, , 17. |
| 4. 25, , 27, , , 30. |
| 1. 7 10 |
| 2. 0 100 |
| 3. 25 24 |
| 4. -7 – 3 |
| 5. -10 0 |
| 1. 10 2 |
| 2. 10 5 |
| 3. 10 -3 |
| 4. 10 0 |
| 5. 10 -5 |