5,451 rounded to the nearest hundred is: 5,500. This is because the value in the tens place is "5". When rounding anything equal to or greater than 5 gets rounded up while everything else gets rounded down.
It is 300 when rounded to the nearest hundred
916 rounded to the nearest hundred is 900
It is already rounded to the nearest hundred thousandths. Rounded to the nearest thousands would be 87.381.
0
0
0
678 is rounded nearest hundred is 700
300
409381900
8900
0
10900