round 18,366, 409,614, 229,930, and 563,239 to the nearest thousands

18,000 410,000 230,000 563,000

Hi there, here is your answer: 18,000 410,000 230,000 563,000 if the number is less than 500 (for example, 1200), you would subtract 200 and your answer would be 1000.  Hope this helps :)