12100
It is 0.
It is 300 when rounded to the nearest hundred
0
0
409381900
It is 0.
12000
The nearest hundred to 12108 is 12100. To round to the nearest hundred, you look at the tens digit, which is 0 in this case. Since 0 is less than 5, you round down to 12100.
It is 300 when rounded to the nearest hundred
916 rounded to the nearest hundred is 900
0
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