570
572.0
It is: 600
It can't be rounded any further, so it is 570.
572 to the nearest ten is 570. 572 to the nearest hundred is 600.
600
853 rounded to the nearest 100: 900. 10853 rounded to the nearest 100: 10900.
570 is the nearest ten. 600 is the nearest hundred.
100
100
0
555 rounded to the nearest 100 is 600.