- Since 1 is in the tenths place, 18.145 is between 18.1 and 18.2
- 18.15 is the midpoint between 18.1 (18.10) and 18.2 (18.20)
- As illustrated on the number line, 18.145 is less than the midpoint (18.15)
- Therefore, 18.145 rounded to the nearest tenth (one decimal place) = 18.1
%20with%20a%20number%20line.png "18.145 rounded to the nearest tenth (one decimal place) with a number line")
