- Determine the two consecutive multiples of 1,000 that bracket 599,399
- 599,399 is between 599,000 and 600,000
- 599,500 is the midpoint between 599,000 and 600,000
- As illustrated on the number line, 599,399 is less than the midpoint (599,500)
- Therefore, 599,399 rounded to the nearest thousand = 599,000
