For the number sixteen, 'six' is the ones word and 'teen' is the tens word. We say the ones first, then tens. However, when you write the number in numerals, the tens come before the ones.

For the number sixteen, 'six' is the ones word and 'teen' is the tens word. We say the ones first, then tens. However, when you write the number in numerals, the tens come before the ones.