3400
In traditional math, you round it up. So 3450 equals 3500.
3450.
3500
3502
853 rounded to the nearest 100: 900. 10853 rounded to the nearest 100: 10900.
100
600
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