- Since 1 is in the tenths place, 5.145 is between 5.1 and 5.2
- 5.15 is the midpoint between 5.1 (5.10) and 5.2 (5.20)
- As illustrated on the number line, 5.145 is less than the midpoint (5.15)
- Therefore, 5.145 rounded to the nearest tenth (one decimal place) = 5.1
%20with%20a%20number%20line.png "5.145 rounded to the nearest tenth (one decimal place) with a number line")
