| Places | Tens | Ones |
|---|---|---|
| Number | 4 | 2 |
| Rounded Number | 4 | 0 |
- 4 is in the tens place and 2 is in the ones place
- Since the digit in the ones place (2) is less than 5, the digit in the tens place (4) does not change
- 0 replaces the (2) in the ones place
- 42 rounded to the nearest ten = 40
