This site: http://www.coolmath.com/prealgebra/08-signed-numbers-integers/index.html
has a great explanation of doing math with integers (or "signed numbers").
Your job is to read each step very carefully and then put the main point of each lesson into
your own words on the sheet of paper I've given to you. Don't fly through this--the idea is
to understand--not to be the first one done. I will be walking around looking at the notes you've
written, so make them good.
tp