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1-5Multiplying and Dividing Integers :1-5Multiplying and Dividing Integers 1-5 Multiplying & Dividing Integers:
Rule: Applies to BOTH multiplication & division.
(+)(+) = +
(+)(-) = -
(-)(+) = -
(-) (-) = +
Multiplication and division of integers is cut & dry!
No worrying about which absolute value is larger or whether you have to change any signs!!
1-5Multiplying and Dividing Integers :1-5Multiplying and Dividing Integers 1-5 Ex. 1. Simplify each expression.
a) 5(-4) = b) -14(-4) = -20 56 7 c) -21  (-3) = d) (-15)  (5) = e) (-6)  (2)(-8) = -3 24
1-5Multiplying and Dividing Integers :1-5Multiplying and Dividing Integers Ex. 2. Evaluate y ÷(x – y) – yz + x for x = 6, y = -9, and z = –2.
-9(6 – (-9)) – (-9)(-2) + 6
-9(6 + (+9)) - (-9)(-2) + 6
-9(15) - (-9)(-2) + 6
-135 – 18 + 6
-135 + -18 + 6
-153 + 6
-147