1. The question asks how rounding is done in a mathematical context. 2. Rounding means approximating a number to a certain degree of precision, usually to a specific number of decimal places or significant figures. 3. For example, to round a number to two decimal places, look at the third decimal digit. 4. If the third decimal digit is 5 or greater, increase the second decimal digit by 1. 5. If the third decimal digit is less than 5, keep the second decimal digit as is. 6. For instance, rounding 3.146 to two decimal places: the third decimal digit is 6 (which is greater than 5), so the second decimal digit 4 becomes 5, resulting in 3.15. 7. This method ensures the rounded number is the closest approximation to the original number at the desired precision.