Alg - Order of Operations

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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 in an expression. 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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-9

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9

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Write an expression for: 'four more than the product of 3 and x'.

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-4

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What is a variable in mathematics?

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A variable is a symbol, often a letter, that represents a number in mathematical expressions or equations.

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What does it mean to simplify an expression?

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To simplify an expression means to reduce it to its simplest form by performing operations and combining like terms.

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What is the difference between an expression and an equation?

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An expression is a combination of numbers, variables, and operations without an equality sign, while an equation states that two expressions are equal.

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6

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11 (due to the Order of Operations, multiplication is done before addition).