| Places | Thousands | Hundreds | Tens | Ones | Tenths | Hundredths | Thousandths | Ten Thousandths | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | ||||||||
| Number | 1 | 8 | 3 | 9 | . | 8 | 4 | 2 | 3 |
| Rounded Number | 1 | 8 | 4 | 0 |
- 9 is in the ones place and 8 is in the tenths place
- Since the digit in the tenths place (8) is greater than or equal to 5, add 1 to the digit in the ones place (9)
- 1 + 9 = 10, so the digit in the ones place becomes 0, and 1 is added to the digit in the tens place (3)
- 1 + 3 = 4, so the digit in the tens place becomes 4
- The decimal point and the digits to the right of the ones place are dropped
- 1,839.8423 rounded to the nearest whole number (ones place) = 1,840
