- Since 9 is in the tenths place, 3.99 is between 3.9 and 4.0
- 3.95 is the midpoint between 3.9 (3.90) and 4.0 (4.00)
- As illustrated on the number line, 3.99 is greater than the midpoint (3.95)
- Therefore, 3.99 rounded to the nearest tenth (one decimal place) = 4.0
%20with%20a%20number%20line.png "3.99 rounded to the nearest tenth (one decimal place) with a number line")
