How do you write numbers in expanded form using only addition?

Answer 1

You can expand a number by addition as much as you want:

2011 = 2000 + 10 + 1

or

2011 = 1000 + 1000 + 10 + 1 (if you only want powers of 10)

or

2011 = 1 + 1 + 1 + 1 + 1 + 1 + ... (if you dont get tired of writing all 2011 ones)