10 to the nearest hundred is zero.
549 and 450 rounded off the nearest hundred is 500
It is 8999950.
They are 599950 and 600050.
You can round off to any values such as the nearest odd number or the nearest tens or hundreds etc.
You can't round off this number in the nearest ten thousand simply because looking at this number it's only on the hundreds place.
Since 839 is less than 850, round it off to 800.
86 rounds to 100
It is 100 when rounded off to the nearest hundred
999999 rounded to the nearest hundred is 1000000 or one million