- Determine the two consecutive multiples of 100 that bracket 21,048
- 21,048 is between 21,000 and 21,100
- 21,050 is the midpoint between 21,000 and 21,100
- As illustrated on the number line, 21,048 is less than the midpoint (21,050)
- Therefore, 21,048 rounded to the nearest hundred = 21,000
