Numerical and Algebraic Expressions CC.2.2.6.B.1

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What is a numerical expression?

Back

A numerical expression is a mathematical phrase that includes numbers and operation symbols, but no variables. For example, 3 + 5 or 12 - 4.

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What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that includes numbers, variables, and operation symbols. For example, 2x + 3 or 5y - 7.

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What does 'sum' mean in mathematics?

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The 'sum' is the result of adding two or more numbers together. For example, the sum of 4 and 5 is 9.

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What does 'difference' mean in mathematics?

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The 'difference' is the result of subtracting one number from another. For example, the difference between 10 and 4 is 6.

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What does 'product' mean in mathematics?

Back

The 'product' is the result of multiplying two or more numbers together. For example, the product of 3 and 4 is 12.

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What does 'quotient' mean in mathematics?

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The 'quotient' is the result of dividing one number by another. For example, the quotient of 12 and 3 is 4.

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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 (PEMDAS/BODMAS).

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What is the order of operations?

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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).

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What does 'four less than' mean?

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'Four less than' means to subtract 4 from a number or expression. For example, four less than x is written as x - 4.

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What does 'doubled' mean?

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'Doubled' means to multiply a number or expression by 2. For example, double of 5 is 2 x 5 = 10.