3.99 rounded to the nearest tenth

Rounding Chart
PlacesOnesTenthsHundredths
11
Number3.99
Rounded Number4.0
  • 9 is in the tenths place and 9 is in the hundredths place
  • Since the digit in the hundredths place (9) is greater than or equal to 5, add 1 to the digit in the tenths place (9)
  • 1 + 9 = 10, so the digit in the tenths place becomes 0, and 1 is added to the digit in the ones place (3)
  • 1 + 3 = 4, so the digit in the ones place becomes 4
  • The digits to the right of the tenths place are dropped
  • 3.99 rounded to the nearest tenth (one decimal place) = 4.0

The solution above and all other related solutions were provided by the Round to the Nearest Tenth Application.