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This is Powerpoint lesson that I use to teach Section 1.5 of the Prentice Hall Algebra 1 textbook. The lesson has two videos that explain the process for multiplying and dividing real numbers. That makes it perfect for new teachers, home teachers, and for days when you can't be in the classroom. (I use that time to take roll.)
Each of the slides can be edited, so you can make them perfect for your specific classes.