Expressions and Equations Retake

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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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11

Front

What does it mean for two expressions to be equivalent?

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Two expressions are equivalent if they have the same value for all values of the variables involved.

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Front

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Sarah has 5 apples and buys some more. Now she has 12 apples. How many apples did she buy?

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21

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What is the distributive property?

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The distributive property states that a(b + c) = ab + ac. It allows you to multiply a single term by two or more terms inside a set of parentheses.

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Yes, both expressions simplify to 20.

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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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What is an equation in mathematics?

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An equation is a statement that two expressions are equal, often containing an equals sign (=).