| Places | Ones | Tenths | Hundredths | Thousandths | |
|---|---|---|---|---|---|
| Number | 3 | . | 9 | 0 | 9 |
| Rounded Number | 3 | . | 9 |
- 9 is in the tenths place and 0 is in the hundredths place
- Since the digit in the hundredths place (0) is less than 5, the digit in the tenths place (9) does not change
- The digits to the right of the tenths place are dropped
- 3.909 rounded to the nearest tenth (one decimal place) = 3.9
