845 rounded to the nearest hundred is 800. This is because the value in the tens place "4" is less than 5.
500
845 rounded to the nearest hundred is 800. Rounded to the nearest 10 is 850
0
3600
3571000
840
800
80,000 is already rounded to the nearest hundreds.
500
845 rounded to the nearest hundred is 800. Rounded to the nearest 10 is 850
0
0
3600
8500
3571000
6248000
2600