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

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

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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 = 14 -2 * -7 = 14 -The product of two integers with odd signs is negative. Example: 2 * -7 = -14 -2 * 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

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

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) = -8 + 6 * -3 = 8 + -12 – (-2) = -8 + -18 = -4 – (-2) = -4 + 2 = -26 -2

You try one: x = -9 y = -5 z = -3 2x + xy ÷z – 3   2(-9) + (-9)(-5) / -3 - 3 -18 + (-9)(-5) / -3 - 3 -18 + 45 / -3 - 3 -18 + -15 - 3

-36 You try one: x = -9 y = -5 z = -3 2x + xy z - 3 2(-9) + -9(-5) (-3) - 3 -18 + 45 (-3) - 3 -18 + -15 – 3 = -33 – 3 = -33 + (-3) = -36

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

-25 Evaluate Expressions -n + 5n + 3 when n = -7 -(-7) + 5(-7) + 3 -(-7) + 5(-7) + 3 7 + -35 + 3 -25

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

Evaluate Expressions with exponents x4 when x = -2 16