1. Multiplying and Dividing Integers
11.4 & 11.5
Multiplying and Dividing Integers
Course 2
Multiplying and Dividing Integers!

2. I can multiply and divide integers!
Course 2
Multiplying and Dividing Integers
1.3 & 1.4
I can multiply and divide integers!

3. Review -4 + 5 -6 + -2 12 + (-15) 3 – (-3) (-6) – 7 (-4) – (-9) 1 -8 -3
3 + 3 = 6
= -13
= 5

4. Let’s think about what happens when we multiply negative numbers…
Course 2
Multiplying & Dividing Integers
1.3 & 1.4
Let’s think about what happens when we multiply negative numbers…
Can you see a pattern or rule? Discuss with your partner your observations.
1. 5 x (-3) = -15
2. 1 x (-4) = -4
3. (-3) X 7 = -21
4. (-2) x 8 = -16
5. (-5) x (-4) = 20
6. (-1) x (-6) = 6
7. (-7) x (-5) = 35
8. (-3) x (-9) = 27 4

5. What about when we divide negative numbers?
Course 2
Multiplying & Dividing Integers
1.3 & 1.4
What about when we divide negative numbers?
Can you see a pattern or rule? Discuss with your partner your observations.
÷ (-3) = -5
÷ (-4) = -4
3. (-21) ÷ 7 = -3
4. (-64) ÷ 8 = -8
5. (-25) ÷ (-5) = 5
6. (-6) ÷ (-6) = 1
7. (-40) ÷ (-5) = 8
8. (-63) ÷ (-9) = 7 5

6. Multiplying and Dividing Integers
Course 2
Multiplying and Dividing Integers
1.3 & 1.4
So When X/÷ Integers:
Do the math as you would normally, then check the signs:
*If the signs are the same your answer is positive.
Example: -3 x -2 = 6
*If the signs are different your answer is negative:
Example: -3 x 2 = -6

7. Multiplying and Dividing Integers Insert Lesson Title Here
Course 2
Multiplying and Dividing Integers
Insert Lesson Title Here
1.3 & 1.4
Let’s Practice
Find each product or quotient.
1. –8 · 2
2. –3 · 5 · (–2)
3. –75 ÷ 5
4. –110 ÷ (–2)
–16 30
–15 55

8. Multiplying and Dividing Integers
Course 2
2-4
Multiplying and Dividing Integers
Let’s Practice
Find each product.
A. –6 · (–5)
–6 · (–5)
Both signs are negative, so
the product is positive. 30
B. –4 · 7
–4 · 7
The signs are different, so
the product is negative.
-28

9. Multiplying and Dividing Integers
Course 2
2-4
Multiplying and Dividing Integers
Now Try Dividing…
Find each quotient.
A. 35 ÷ (–5)
35 ÷ (-5)
Think: 35 ÷ 5 = 7. –7
The signs are different, so the
quotient is negative.
B. –32 ÷ (–8)
-32 ÷ (–8)
Think: 32 ÷ 8 = 4.
The signs are the same, so the
quotient is positive. 4

10. Multiplying and Dividing Integers Insert Lesson Title Here
Course 2
2-4
Multiplying and Dividing Integers
Insert Lesson Title Here
What about this one?
5. The temperature at Bar Harbor, Maine, was
–3°F. It then dropped during the night to
be 4 times as cold. What was the temperature
then?
–12°F