800
850
853 rounded to the nearest 100: 900. 10853 rounded to the nearest 100: 10900.
847 to the nearest hundred is 800. Since 47 is less than half of 100, you round down.
850
100
100
97 rounded to the nearest hundred is 100. 97 rounded to the nearest ten is 100
0
555 rounded to the nearest 100 is 600.
100
100
800