How do you round decimals to thousands?

Answer 1

Examine the number string formed by all the digits from three digits to the left of the decimal point and going right.

1. If that number is less than 500 then replace the whole string by 000.
2. If that number is greater than 500 then add 1 to the previous digit and replace the string by 000.
3. If the number is exactly 500 then:

• if the previous digit was even, replace the string by 000, or
• if the previous digit was odd, add 1 to it and replace the string by 000.