| Places | Hundreds | Tens | Ones |
|---|---|---|---|
| 1 | |||
| Number | 1 | 2 | 9 |
| Rounded Number | 1 | 3 | 0 |
- 2 is in the tens place and 9 is in the ones place
- Since the digit in the ones place (9) is greater than or equal to 5, add 1 to the digit in the tens place (2)
- 1 + 2 = 3, so the digit in the tens place becomes 3
- 0 replaces the (9) in the ones place
- 129 rounded to the nearest ten = 130
