In this lesson, you will learn how to multiply and divide positive and negative numbers. The rules for determining whether the answer is positive or negative are explained and demonstrated using several examples. The lesson also includes a physical model using counters to help explain why negative times negative produces a positive result, as well as a pattern-based justification for the same concept. By the end of the lesson, you will have a solid understanding of multiplying and dividing with positive and negative numbers.
Shows the rules for multiplying and dividing negative and positive numbers. Shows why negative times negative produces a negative number using counters.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com