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Section 1.1 Expressions & Formulas

This section dives into the essential concepts of expressions and formulas, focusing on the Order of Operations (PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction). It elaborates on the procedure for evaluating numerical expressions, emphasizing the importance of starting with inner grouping symbols and working from left to right. Additionally, it provides practical examples, including how to find the area of a trapezoid, and details a homework worksheet for practice, ensuring students demonstrate their methodology to earn credit.

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Section 1.1 Expressions & Formulas

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  1. Section 1.1Expressions & Formulas August 24, 2010

  2. Vocabulary • Order of Operations • Procedure followed when evaluating numerical expressions • A common acronym is used as a memory device

  3. Order of Operations • P Parentheses/Brackets • E Exponents • M Multiplication • D Division • A Addition • S Subtraction Please Excuse My Dear Aunt Sally. • Be sure to start with the inner-most grouping symbols • Always work from left to right 4 basic math operations

  4. Find the value of Evaluate if and Example 1: Example 2: Example 1-1a

  5. Evaluate if , , and Evaluate if and Example 3: Example 4: Example 1-3a

  6. Area of a trapezoid Example 5: Find the area of a trapezoid with base lengths of 13 meters and 25 meters and a height of 8 meters. Example 1-4a

  7. Homework • Worksheet 1-1 # 1 – 25 odd • Complete on a separate sheet • Write the problem and show work. No work – No Credit

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