100
When rounding 55 to the nearest hundred up, it becomes 100. This is because 55 is closer to 100 than it is to 0. When rounding 55 to the nearest hundred down, it remains 0. This is because 55 is closer to 0 than it is to 100.
60
55 rounded to nearest ten is 60
853 rounded to the nearest 100: 900. 10853 rounded to the nearest 100: 10900.
100
100
0
555 rounded to the nearest 100 is 600.
97 rounded to the nearest hundred is 100. 97 rounded to the nearest ten is 100
100
100