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Slide 2 Slide 3 Lesson 1.2 Slide 4 Use the order of operations Use grouping symbols Slide 5 What do you remember about Order of Operations? Does it matter the order that I work any problem? Slide 6 Abbott and Costello What happened? Slide 7 Slide 8 The order in which you perform operations can affect the value of an expression. To avoid confusion, mathematicians have agreed on an order of operations. Multiply and divide first. Then add and subtract.order of operations. Slide 9 To simplify a numerical expression, you use the order of operations and replace the expression with the simplest name for its value. Slide 10 Order of Operations 1. Work inside Grouping symbols. 2. Multiply and Divide in order from left to right. 3. Add and subtract in order from left to right. Slide 11 In your Notebook Simplify 4 + 15 3. Slide 12 In your Notebook Simplify 12 3 1 Simplify 10 1 7 Slide 13 1. 8 2 2 2. 12 3 1 2 + 1 Slide 14 a) 2 + 5 x 3 b) 12 3 1 c) 10 1 7 Slide 15 Simplify 3 5 8 4 + 6 Slide 16 Simplify 4 1 2 + 6 3 Simplify 5 + 6 4 3 1 Slide 17 Order of Operations 1. Work inside grouping symbols 2. Exponents 3. Multiply and divide in order from left to right. 4. Add and subtract in order from left to right. Slide 18 Start with the innermost grouping symbol when there is more than one level of grouping symbols. Levels of Grouping Symbols { [ ( ) ] } Brackets Braces Parenthesis Slide 19 Simplify 20 3 [(5 + 2) 1] Slide 20 Slide 21 Slide 22 Pg. 11 (1-31) ODD Answers will be on Moodle