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
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