0 (zero)
The rule in rounding off is that if the first figure to be discarded is a 5 or more, the previous figure is increased by 1.
As the number is being rounded to the nearest hundred then 46 can be regarded as 046. As 4 (the first figure to be discarded) is less than 5, then the previous number (0) remains unchanged. Therefore, 046 becomes 000 or simply 0.
0
5300
It is 300 when rounded to the nearest hundred
916 rounded to the nearest hundred is 900
46
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
10900