- Since 8 is in the tenths place, 138.867545518 is between 138.8 and 138.9
- 138.85 is the midpoint between 138.8 (138.80) and 138.9 (138.90)
- As illustrated on the number line, 138.867545518 is greater than the midpoint (138.85)
- Therefore, 138.867545518 rounded to the nearest tenth (one decimal place) = 138.9
%20with%20a%20number%20line.png "138.867545518 rounded to the nearest tenth (one decimal place) with a number line")
