The goals of today's lesson:
- Use a number line and motion model to develop the relationship between repeated addition and multiplication with integers
- Develop and use algorithms for multiplying integers.
Some of the algorithms uncovered by our students were:
- When two factors have the same sign then the product is positive.
- When two factors have opposite signs the product is a negative number.
Here is a video showing a different method of understanding the multiplication of integers using a pattern method.