I suspect you mean "rounded to the nearest hundredth".
One hundredth is 0.01. So you want to round to the second digit after the decimal point.
In this case it would be 1.96 because you consider the third digit after the decimal point to change the second one, here 2 is less than 5.
Hence 1.962 is closer to 1.96 than it is to 1.97.
It is 300 when rounded to the nearest hundred
916 rounded to the nearest hundred is 900
5800
0
It is already rounded to the nearest hundred thousandths. Rounded to the nearest thousands would be 87.381.
0
10000
0
0
678 is rounded nearest hundred is 700
10900
500