That number is 5.48 rounded to the nearest hundredth. The second number after the decimal is the hundredth, so you take the number after that and if it is five or higher than the hundredth is added by one. If not, then it is the same as it is shown.
An integer rounded to the nearest fractional part will always equal the same integer. Therefore, rounded to the nearest hundredth, 416254 is equal to 416254 - or, if you want to show decimal place value, 416254.00.
2570.00 The hundredth place means the number is to 2 decimal place. 2570 to 2 decimal place is as good as adding the decimal point and two zeros right behind. If 2570 has to be rounded off to the nearest hundred, the result would be 2600.