- Determine the two consecutive multiples of 100 that bracket 3,509
- 3,509 is between 3,500 and 3,600
- 3,550 is the midpoint between 3,500 and 3,600
- As illustrated on the number line, 3,509 is less than the midpoint (3,550)
- Therefore, 3,509 rounded to the nearest hundred = 3,500
