Answer:
490600
Explanation:
The answer would be 490600 because when you are rounding you start at the ones. So 8, you can round 8 up to ten which adds the the ten that was there which results in 20. 20 isn't large enough to be rounded up so it has to be rounded down 20, the 6 is affected by the 2 (because it couldn't be rounded up) so it stays the same therefore your answer is 490600. :D