It is: 500
450
500
0
549 and 450 rounded off the nearest hundred is 500
3600
450 to 549
450
As is. It is already rounded to the nearest tens place.
450
You do nothing. 450 is already rounded to the nearest ten.
80,000 is already rounded to the nearest hundreds.
500
0
0
450
450
549 and 450 rounded off the nearest hundred is 500