How to round a number in C#?

Question

C++ / C#

I'm sure you immediately thought of Mathf.Round() , but it won't help here. I need to round for example: from 625 round to 620 , that is, round units, or even immediately round tens, that is, from 625 to 600. Any options?

Answer 1

Round tens 625/10=62.5 round by round, then multiply by 10 = 620
Round hundredths 625/100=6.25 round by round, then multiply by 100 = 600
etc.