| Places | Ones | Tenths | Hundredths | Thousandths | Ten Thousandths | Hundred Thousandths | Millionths | Ten Millionths | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | |||||||||
| Number | 3 | . | 3 | 9 | 9 | 1 | 8 | 7 | 5 |
| Rounded Number | 3 | . | 4 |
- 3 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 (3)
- 1 + 3 = 4, so the digit in the tenths place becomes 4
- The digits to the right of the tenths place are dropped
- 3.3991875 rounded to the nearest tenth (one decimal place) = 3.4
