How to round to the tenth

Inna Zavadskaya
Inna Zavadskaya
September 18, 2014
How to round to the tenth

When super precision is not needed in calculations, it becomes necessary to round decimals to tenths. The result is an approximate number. To emphasize this fact, you need to use the special symbol ≈, which reads "approximately equal."

To round the number to the tenth, you must leave one digit after the comma, and discard the rest, taking into account the rounding rules:

  • if the second digit after the comma is in the range from 0 to 4 inclusive - the first digit after the comma is left unchanged
  • if the second digit after the decimal point is between 5 and 9 inclusive - the first digit after the decimal point is increased by one

For clarity, we consider a few examples.

  1. It is necessary to round up to the tenth number 44,308163.To complete the task, you must leave one digit after the comma. Since the second digit is 0, the first digit after the comma remains unchanged. Thus, 44.308163 ≈ 44.3
  2. 187,697651 ≈ 187,7. To round the number to the tenth, we leave only one digit after the comma. Since the second digit after the comma equals 9, we increase the first digit by one.
  3. 49,986236 ≈ 50,0. The second digit after the comma is 8, which means that the first digit is incremented by one.

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