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For reference, the four items mentioned in the second paragraph:

http://en.wikipedia.org/wiki/Chunking_(division)

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

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

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

I have always been terrible at multiplication and when I am forced to do it always use a method identical to the grid method. Except I didn't know it had a name. I just cheated and did this because it seemed like a non-optimal but straight forward way to an answer that was self evidently correct.

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