The nearest ten to 456 is 460. When rounding a number to the nearest ten, you look at the digit in the tens place. If the digit in the ones place is 5 or greater, you round up; if it is less than 5, you round down. In this case, 456 is closer to 460 than to 450.
754 is the nearest 1,000
460
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