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Published byJanessa Stockbridge Modified over 2 years ago

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Lesson 1.2

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Use the order of operations Use grouping symbols

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What do you remember about Order of Operations? Does it matter the order that I work any problem?

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Abbott and Costello What happened?

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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.

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To simplify a numerical expression, you use the order of operations and replace the expression with the simplest name for its value.

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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.

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In your Notebook Simplify 4 + 15 ÷ 3.

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In your Notebook Simplify 12 ÷ 3 – 1 Simplify 10 – 1 · 7

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1. 8 – 2 2 2. 12 ÷ 3 – 1 2 + 1

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a) 2 + 5 x 3 b) 12 ÷ 3 – 1 c) 10 – 1 7

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Simplify 3 5 8 ÷ 4 + 6

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Simplify 4 – 1 · 2 + 6 ÷ 3 Simplify 5 + 6 · 4 ÷ 3 – 1

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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.

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Start with the innermost grouping symbol when there is more than one level of grouping symbols. Levels of Grouping Symbols { [ ( ) ] } Brackets Braces Parenthesis

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Simplify 20 – 3 [(5 + 2) – 1]

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Pg. 11 (1-31) ODD Answers will be on Moodle

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