6.70
Since there is no digit after the hundredths, there is nothing to round. In other words, you leave the number as it is.
6.70
3.324 rounded to nearest hundredths is 3.32
9.37
3.97
8.20
23.87
346.77
It is then 23.68 when rounded to the nearest hundredths
62.71
8.47
3.324 rounded to nearest hundredths is 3.32
9.37
3.80
9.67
240.19
84172.00
837.36
14.74