- Determine the two consecutive multiples of 100 that bracket 345,231
- 345,231 is between 345,200 and 345,300
- 345,250 is the midpoint between 345,200 and 345,300
- As illustrated on the number line, 345,231 is less than the midpoint (345,250)
- Therefore, 345,231 rounded to the nearest hundred = 345,200
