1. Multiplying and Dividing Integers
Essential Question:
How do I multiply and divide integers?
Saturday, September 15, 2018

2. Multiplication of Integers-8
Evaluate: = ________
Repeated addition is the same thing as:__________________
...so can be written:________
Evaluate: = ______________
. ..so can be written:________
Multiplication
4(-2)
-12
Multiplication
3(-4)

3. Multiplication of Integers
-35
Evaluate: = ______________
...Rewrite as a multiplication problem:_________
Evaluate: = ______________=_________
Evaluate: = ______________=_________
5(-7)
-24
2(-12) -5
5(-1)

4. Multiplication of Integers
(+)(–) = (–)
(–)(+) = (–)
(+)(+) = (+)
(–)(–) = (+)

5. 7(-8) = _____ 56
-56 -1
-15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

6. -6(-7) = _____ 49
-42
-13 42 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

7. -9(3) = _____ 27 -6
-36
-27 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

8. Which of the following statements is NOT true?
A negative multiplied by a negative is a positive product.
A positive multiplied by a negative is a negative product.
A negative multiplied by a negative is a negative product.
A negative multiplied by a positive is a negative product. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

9. Division of Integers Example 1: Negative divided by a Positive: -8 -8
so… -8
or…
Negative
Negative divided by a positive will always result in a:______________

10. Division of Integers Example 2: Positive divided by a Negative: -7 -7
so… -7
or…
Negative
Positive divided by a negative will always result in a:______________

11. Division of Integers c b a The Division Algorithm: If then
Example 2: Negative divided by a Negative: 6
so… 6
or…
Positive
Negative divided by a negative will always result in a:______________

12. Wait a minute…these look familiar!
Division of Integers
Wait a minute…these look familiar!
These are the same rules as:____________________________
A division problem with different signs is:______________
A division problem are the same signs is:_____________
Multiplication
Negative
Positive

13. Evaluating Integer Expressions
Saturday, September 15, 2018

14. Evaluate: 8 -8 7 -9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

15. Evaluate: 21
-20
-22
-21 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

16. Evaluate: -7 7 8 -6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

17. Evaluating Integer Expression
Today you will use the Order of Operations and your knowledge about integer operations to simplify some complex expressions.
Order of Operations:
Parentheses
Exponents
Multiplication and Division
Addition and Subtraction

18. Evaluate: -14 -30 20 -8 I need help with this. 1 2 3 4 5 6 7 8 9 10 1112 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

19. Evaluate: 315 -105 3 -76 I need help with this. 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28