- Determine the two consecutive multiples of 10 that bracket 9,989
- 9,989 is between 9,980 and 9,990
- 9,985 is the midpoint between 9,980 and 9,990
- As illustrated on the number line, 9,989 is greater than the midpoint (9,985)
- Therefore, 9,989 rounded to the nearest ten = 9,990
