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Algebraic Expressions – Introduction Lesson 3.1 Big Ideas How can you determine the parts of an algebraic expression? Start-Up Activity – Discuss with a partner for a few minutes. Similarity • Just like a newspaper article, there are necessary parts to an algebraic expression. • An expression must include numbers, operations and one or more symbols. Important to Note! • Each term must be separated by either a + (Addition) or – (Subtraction) sign. • Answer to Addition Problem = Sum (uses terms) • Answer to Subtraction Problem = Difference (Uses terms) • Answer to Multiplication Problem = Product (Uses factors) • Answer to Division Problem = Quotient (uses factors) Example 1 Extra Example Mini Assessment Answers Describing an Expression in Words • 18 ÷ 3 • 8+7 The quotient of 18 and 3 The sum of the terms 8 and 7 • 5 (6-2) The product of the factors 5 and 6 – 2. Because there are parenthesis around 6 - 2, it is considered one factor. • 4 + (6 ÷ 3) The sum of the terms 4 and 6 ÷ 3. There are just two terms because of the parenthesis. Summary • What are the parts to an algebraic expression? We will be working more with expressions and evaluating them in the coming weeks.