- Determine the two consecutive multiples of 10 that bracket 128,173
- 128,173 is between 128,170 and 128,180
- 128,175 is the midpoint between 128,170 and 128,180
- As illustrated on the number line, 128,173 is less than the midpoint (128,175)
- Therefore, 128,173 rounded to the nearest ten = 128,170
