Modeling Multiplying and Dividing Integers

Multiplying & Dividing Integers

Same signs = Positive

Different signs = Negative

Multiple Select

What will the sign of the product be if you multiply a negative integer by a positive integer?

• Positive

• Negative

(3)(-4)= ?     OR     What does 3 groups of -4 equal?

Poll

What will the sign of the product be if you multiply two negative integers?

• Positive

• Negative

• Positive and Negative

NOTES

Since (-2) = -(2) ,

(-2)(-5) = -(2)(-5)

We could read this as the opposite of two times negative five. So, we would find out how much 2 groups of negative 5 would equal and then take its opposite.

(-2)(-5) = 10

NOTES

Remember Fact Families? That is how you know multiplying and dividing integers have the same rules.
(-2)(-5)=10 so  $10\div-2=-5$  

(3)(-4)=-12 so  $-12\div-4=3$  

https://www.youtube.com/watch?v=DG0mWUFFiJo

Multiple Choice

-8 / -2 =

• -10

• -4

• 4

• -6

Multiple Choice

(-5)(7) =

• 2

• -12

• 35

• -35