digit

a number symbol

5,467

What is the second digit?

4

What is the last digit?
7

What is the first digit?
5

http://en.wikipedia.org/wiki/Numerical_digit

http://www.merriam-webster.com/dictionary/digit

http://www.kidzone.ws/math/winter/index.htm

http://www.aaamath.com/plc31_x2.htm

adding 2 digit numbers

http://www.dositey.com/2008/addsub/as85/add3r.htm

http://www.netrover.com/~kingskid/double.htm

http://www.quia.com/mathjourney.html

http://www.kidsmathblog.com/three-digit-math-subtraction-with-regrouping/