Order of Operations and Evaluating Algebraic Expressions

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What is the order of operations in mathematics?

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The order of operations is a set of rules that determines the sequence in which calculations are performed. The acronym PEMDAS helps remember the order: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

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CCSS.7.NS.A.3

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What does the 'P' in PEMDAS stand for?

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The 'P' in PEMDAS stands for Parentheses. Operations inside parentheses should be performed first.

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What does the 'E' in PEMDAS stand for?

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The 'E' in PEMDAS stands for Exponents. After parentheses, evaluate exponents next.

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CCSS.6.EE.A.1

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2

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CCSS.6.EE.A.2C

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9

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CCSS.6.EE.A.2C

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Evaluate the expression: 5a + b for a = 6 and b = 3.

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33

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CCSS.6.EE.A.2C

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What operation should be performed first when evaluating an expression?

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Parentheses.

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CCSS.6.EE.A.2C

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13 (Multiplication is performed before addition.)

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CCSS.7.NS.A.3

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18 (Parentheses are evaluated first.)

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CCSS.5.OA.A.1

CCSS.5.OA.A.2

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7 (Perform subtraction and addition from left to right.)

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CCSS.5.OA.A.1

CCSS.5.OA.A.2