- Determine the two consecutive multiples of 10 that bracket 1,239
- 1,239 is between 1,230 and 1,240
- 1,235 is the midpoint between 1,230 and 1,240
- As illustrated on the number line, 1,239 is greater than the midpoint (1,235)
- Therefore, 1,239 rounded to the nearest ten = 1,240
