Modeling Multiplying Integers

Multiplying Integers

Easier than you think!

Poll

Choose an emoji that describes how you feel about adding integers.

Poll

Choose an emoji that describes how you feel about subtracting integers.

Today's Learning Goal

I can multiply integers.

Two Basic Steps

• Step 1: Multiply the absolute values of the factors.

• Step 2: Determine the sign of the product (answer) from the number of negative signs.

First of all, what is absolute value?

• These symbols | |

• Distance between a number and 0 on a number line.

• It is always positive.

Multiple Choice

What is the absolute value of 3?

• -3

• 3

Multiple Choice

|-6|

• 6

• -6

Multiple Choice

How about the absolute value of 83,856,472?

• -83,856,472

• 83,856,472

4 x -7

Step 1: Multiply the absolute values of 4 and -7

The absolute value of 4 is 4 and the absolute value of -7 is 7.

Fill in the Blanks

$4\times7$  

Step 2: Determine the sign of the product (answer).

• Even number of negative signs in factors = positive product

• Odd number of negative signs in factors = negative product

Fill in the Blanks

How many negative signs are in the factors of our original problem?

4 x -7

Fill in the Blanks

What is the correct answer to our problem?

4 x -7

PS: The answer was -28.

Multiple Choice

$$-6\times5\ =\ ?$$  

• 30

• -30

Multiple Choice

$$0\times\left(-4\right)=\ ?$$  

• 4

• 0

• -4

Multiple Choice

$$2\times\left(-4\right)=\ ?$$  

• -8

• 8

Multiple Choice

$$-2\times\left(-6\right)=\ ?$$  

• -12

• 12

Poll

Choose an emoji that describes how you feel about multiplying integers.

Now what?

Go to your Google Classroom Classwork Tab to find the next assignment. HOORAY