- Determine the two consecutive multiples of 1,000 that bracket 39,645
- 39,645 is between 39,000 and 40,000
- 39,500 is the midpoint between 39,000 and 40,000
- As illustrated on the number line, 39,645 is greater than the midpoint (39,500)
- Therefore, 39,645 rounded to the nearest thousand = 40,000
