Addition and Subtraction

Number Patterns

Hi Mad Mathers,
Number patterns are a big part of discovering the realtionships between addition, subtraction, multiplication and division.  Just for fun, view the video clip about the number twelve.  The song is cute but if you watch the pictures closely you well see many different arrays to make the number twelve.  List these different arrays then draw them, try to identify the many ways you can represent them using number and the operations.
Do you notice any special relationships?