Question

How do you write 4.5 with the same number of decimal places as 6.25

Answer 1

4.50 should be the right answer.

Answer 2

If you mean you want to have it go into the hundredths place (the second digit behind the period) you could just add a zero. the zero's dont change the number but help you incase your doing something like 9.75 - 8.5 just add a zero and you would get 9.75 - 8.50 = 1.25 
i hope this helps you :)