To round numbers to the nearest hundreds, we look at the tens digit of the number. If the tens digit is 5 or greater, we round up. If it's less than 5, we round down. Let's apply this to the given numbers:
127:
Tens digit is 2 (which is less than 5).
Round down to 100.
351:
Tens digit is 5 (which is equal to 5).
Round up to 400.
726:
Tens digit is 2 (which is less than 5).
Round down to 700.
865:
Tens digit is 6 (which is greater than 5).
Round up to 900.
1842:
Tens digit is 4 (which is less than 5).
Round down to 1800.
1177:
Tens digit is 7 (which is greater than 5).
Round up to 1200.
2288:
Tens digit is 8 (which is greater than 5).
Round up to 2300.
6364:
Tens digit is 6 (which is greater than 5).
Round up to 6400.
By following these simple steps, you can round any number to the nearest hundred accurately!