- Determine the two consecutive multiples of 1,000 that bracket 8,639
- 8,639 is between 8,000 and 9,000
- 8,500 is the midpoint between 8,000 and 9,000
- As illustrated on the number line, 8,639 is greater than the midpoint (8,500)
- Therefore, 8,639 rounded to the nearest thousand = 9,000
