| Places | Tens | Ones | Tenths | Hundredths | |
|---|---|---|---|---|---|
| Number | 2 | 1 | . | 3 | 1 |
| Rounded Number | 2 | 1 |
- 1 is in the ones place and 3 is in the tenths place
- Since the digit in the tenths place (3) is less than 5, the digit in the ones place (1) does not change
- The decimal point and the digits to the right of the ones place are dropped
- 21.31 rounded to the nearest whole number (ones place) = 21
