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1.2 Order of Operations and Evaluating Expressions:

1.2 Order of Operations and Evaluating Expressions:. Power: Has two parts, the base and exponent ( b 2  b = base, 2 = exponent ). Exponent: The number that tells you how many times we multiply the base. Base: The number that is multiplied according to the exponent.

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1.2 Order of Operations and Evaluating Expressions:

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  1. 1.2 Order of Operations and Evaluating Expressions: Power: Has two parts, the base and exponent ( b2 b = base, 2 = exponent ) Exponent: The number that tells you how many times we multiply the base.

  2. Base: The number that is multiplied according to the exponent Simplify: Perform math operations to get a shorter expression and/or an answer. Evaluate: Replace the variables with given numbers to simplify an expression.

  3. GOAL:

  4. REAL-WORLD: An object’s momentum is defined as the product of its mass m and velocity v. Write and expression for the momentum of the object. Make a table to find the momentum of a vehicle with a mass of 1000 kg moving at a velocity of 15 m/s, 20 m/s and 25 m/s.

  5. SOLUTION: Expression: Momentum = (mass)(velocity) mass = m velocity = v Momentum = (m)(v)

  6. SOLUTION: Table: Momentum = (m)(v)

  7. Evaluate the expression for s = 4 and t = 8 ( s + t ) 3 YOU TRY IT:

  8. SOLUTION: When we evaluate we replace the given value for the variables. S = 4 and t = 8 (s + t ) 3 Replace PEMDAS (4 + 8 ) 3 (12) 3 Multiplication (12)(12)(12) Therefore: 1728 is the answer.

  9. VIDEOS: Variables and Expressions Variables: http://www.khanacademy.org/math/algebra/introduction-to-algebra/variable-and-expressions/v/what-is-a-variable Expressions: http://www.khanacademy.org/math/algebra/introduction-to-algebra/variable-and-expressions/v/variables-and-expressions-1

  10. CLASSWORK:Page 13-15: Problems: As many as it takes you to master the concept.

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