| Places | Tens | Ones | Tenths | Hundredths | |
|---|---|---|---|---|---|
| 1 | |||||
| Number | 1 | 2 | . | 0 | 9 |
| Rounded Number | 1 | 2 | . | 1 |
- 0 is in the tenths place and 9 is in the hundredths place
- Since the digit in the hundredths place (9) is greater than or equal to 5, add 1 to the digit in the tenths place (0)
- 1 + 0 = 1, so the digit in the tenths place becomes 1
- The digit in the hundredths place is dropped
- 12.09 rounded to the nearest tenth (one decimal place) = 12.1
