| Places | Ten Thousands | Thousands | Hundreds | Tens | Ones | Tenths | |
|---|---|---|---|---|---|---|---|
| 1 | 1 | ||||||
| Number | 1 | 7 | 8 | 0 | 9 | . | 7 |
| Rounded Number | 1 | 7 | 8 | 1 | 0 |
- 9 is in the ones place and 7 is in the tenths place
- Since the digit in the tenths place (7) 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 (0)
- 1 + 0 = 1, so the digit in the tens place becomes 1
- The decimal point and the digit in the tenths place are dropped
- 17,809.7 rounded to the nearest whole number (ones place) = 17,810
