1. Bellringer
|-8| - 15 – 8 =
-7 – (- 7) =

2. Bellringer
|-8| - 15 – 8 =
-7 – (- 7) =
-15

3. Go over homework

4. 2. If even – answer is positive 3. If odd – answer is negative
Ch. 1-8 Multiplying and Dividing Integers
1. Count negative signs
2. If even – answer is positive
3. If odd – answer is negative
Multiplying & Dividing Integers:
-The product of two integers with the even signs is positive.
Example: 2 * 7 = * -7 = 14
-The product of two integers with odd signs is negative.
Example: 2 * -7 = * 7 = -14
-The quotient of two integers with even signs is positive.
Example: 8/2 = 4 -8/-2 = 4
-The quotient of two integers with odd signs is negative.
Example: -8/2 = -4 8/-2 = -4

5. Example 1: Multiply the following integers.
a.) 3 * -6 b.) -4 * -5 c.) -2 * 3 * -4
-18
Odd
neg
even
pos 20 24
even
pos
Example 2: Divide the following integers.
a.) -18/-2 b.) 12/-6 c.) -24/2
Odd
neg 9
even
pos -2
-12
Odd
neg
Example 3: Evaluate each algebraic expression below. Use order of operations!
p = 4 t = -2 r = -3
a.) pt + (p – t) * r b.) 2p + pr – t

6. Example 3: Evaluate each algebraic expression below
Example 3: Evaluate each algebraic expression below. Use order of operations!
p = 4 t = -2 r = -3
a.) pt + (p – t) * r b.) 2p + pr – t
4(-2) + (4 –(-2)) * -3
2(4) + 4(-3) – (-2)
4(-2) + 6 * -3 =
8 + 4(-3) – (-2) =
* -3 =
– (-2) = =
-4 – (-2) = =
-26 -2

7. You try one: x = -9 y = -5 z = -3 2x + xy ÷z – 3
2(-9) + (-9)(-5) /
-18 + (-9)(-5) / /

8. -36 You try one: x = -9 y = -5 z = -3 2x + xy z - 3
2(-9) + -9(-5) (-3) - 3
(-3) - 3
– 3 = -33 – 3 = (-3) =
-36

9. Homework
Textbook pg 46 #10-30 even Show steps – 28 and 30 extra credit even odd positive negative

10. -25 Evaluate Expressions -n + 5n + 3 when n = -7 -(-7) + 5(-7) + 3
-(-7) + 5(-7) + 3
-25

11. Evaluate Expressions
6n when n= -7
-3x + x – 2 when x = -4
-39 6

12. Evaluate Expressions with exponents
x4 when x = -2 16