Answer – Rounding 42.2586021 to three decimal places gives 42.259.
Explanation:
Follow the steps below to round any number to three decimal places, or the thousandths place:
1. Identify the digit in the third decimal place—count along the first 3 numbers to the right of the decimal point. In 42.2586021, this is 8.
2. Look at the digit to the right of it (the digit in the fourth decimal place). In 42.2586021, this is 6.
3. Check if this digit in the fourth decimal place is equal to 4 or less, or 5 or more. If it is 4 or less, remove it and all the digits to its right (or round down); if it is 5 or more, add 1 to the digit in the third decimal place and remove all the digits after (or round up).
Since 6 is greater than 5, 42.2586021 is rounded up to 42.259.
Thus, 42.2586021 when rounded to three decimal places is 42.259.
