General :: Change All Number 10 In A Text File To Word Form?

I need to change all number 10 in a text file to word form, or in short from 10->ten. the thing is number 10 including in dates such as 10/22/1997 or 03-10-2011 should not be changed. im having some trouble because the file contains numbers like "price range from 10-50k".

this is just a sample.

name: john smith
birthday: 10-11-1995
date hired: 05/10/2010
expected salary: 10-50k
typing speed: 10 wpm

[Code].....

Using sed command is it possible to change like this..