3.1 and 3.2 Multiplying Integers

Focus Question: How do we determine the sign of the product when multiplying 2 or more integers?

In this lesson, we are going to explore some different ways to think about the meaning of multiplying integers.  Here is what we are going to do:

Part 1:  Modelling Integer Multiplication (and Division)

Using the picture below, you should be able to create 5 different number sentences and describe what each number sentence means in terms of multiplication, division, or addition.

Part 2: Developing the Rules For Multiplication

On page 55 and 56 of your textbook, there is a description of a relay race where students are running between (-50m) and (+50m) on a number line.  Work through Task A in order to help you develop the rules for multiplying integers.

Part 3: Applying The Rules

Once you know the rules, you should be able to predict whether the final product is either greater than zero (positive) or less than zero (negative) just by looking at the question.  Try this by using the image below:

If you want to look at the entire lesson, here is the slideshow:

This is what you MUST do before next class:

• Finish the "Famous Farmer Saying" worksheet.
• ACE (1-10) (28-31) p. 66