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6.4 Goal: Multiplying Integers

6.4 Goal: Multiplying Integers. Same Sign: The product of two integers with the same sign is positive. Ex. 4 x 2 =8 -4 x (-2) = 8 . 6.4 Goal: Multiplying Integers.

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6.4 Goal: Multiplying Integers

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  1. 6.4 Goal: Multiplying Integers Same Sign: The product of two integers with the same sign is positive. Ex. 4 x 2 =8 -4 x (-2) = 8

  2. 6.4 Goal: Multiplying Integers Different Signs: The product of two integers with different signs is negative. Ex. 4 x (- 2 )= -8 -4 x 2= -8

  3. 6.4 Goal: Multiplying Integers Zero: The product of an integer and 0 is 0. EX. 4 x 0 = 0 -4 x 0 = 0

  4. Example 1: Multiply Integers A. -5 (-7) = B. -8(2)= C. -12(0) =

  5. Your Turn!! A. 9 (2)= B. -3(-4)= C. 5(-5)= D. -7 (7) E. 0(-14) =

  6. Example 2: Evaluation Variable Expressions A. Evaluate a² when a = -3. B. Evaluate xyz when x=2, y=-4, z=6

  7. Example 3: Using Integer Multiplication Most of Greenland is covered with ice that in some places is almost two miles thick. Scientists estimate that 3 feet of this ice melts each year. Find the change in the thickness of the ice after 10 years.

  8. Practice Page 274 12-32

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