How do I get back a 2 digit representation of a number in SQL 2000

SELECT REPLACE(STR(mycolumn, 2), ' ', '0')

select case when mycolumn between -9 and 9 then '0' + str(mycolumn) else str(mycolumn) end

select right('0'+ltrim(str(n)),2)

select right(str(100+n),2)