Solving Expressions Practice

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What is an expression in mathematics?

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An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.

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How do you evaluate an expression?

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To evaluate an expression, substitute the values of the variables into the expression and perform the operations according to the order of operations.

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What does it mean to substitute a value in an expression?

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Substituting a value means replacing a variable in the expression with a specific number.

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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: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right) - often abbreviated as PEMDAS.

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What is a variable in an expression?

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A variable is a symbol (often a letter) that represents an unknown value in an expression or equation.