I don't qite understand this question has written my homework...I need help.

State ALL of the families to which the number 4 belong?
What does she mean I never heard of that b4 is she talkin about multiplying or so?

Since this is not my area of expertise, I searched Google under the key words "math families" to get this:

http://www.google.com/search?client=safari&rls=en&q=math+families&ie=UTF-8&oe=UTF-8

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.