Answer:
200, 500, 600
Explanation:
When looking to round to the nearest hundred, we are wanting to change the second and third digits to zeros, leaving only the first, or 'hundred' digit. When rounding, the general rule is if the second and third digits are over or equal to 50, then round the first digit up to the next number. If it is below 50, the first digit will stay the same, as we are rounding down. Hence:
169 → 200 (69 is greater than or equal to 50, so 1 becomes 2)
469 → 500 (69 is greater than or equal to 50, so 4 becomes 5)
647 → 600 (47 is less than 50, so 6 stays as 6 )
Hope that helps!