So, \(3.168\) rounds up to \(3.17\) (to two decimal places). Round \(17.839\) to one decimal place. If the number at the next decimal place is smaller than five then leave the previous decimal ...

while \(4.34\) has two decimal places. To round a number to a given number of decimal places, the answer must have that number of decimal places - even if you have to add some zeros. For example ...