Numerical Expressions

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What is a numerical expression?

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A numerical expression is a mathematical phrase that includes numbers and operations (such as addition, subtraction, multiplication, and division) but does not have an equal sign.

Tags

CCSS.6.EE.A.1

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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 order is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). This is often remembered by the acronym PEMDAS.

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CCSS.7.NS.A.3

Front

Solve: 4 + 9 + 8 ÷ 4

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15

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CCSS.7.NS.A.3

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Back

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CCSS.6.EE.A.1

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Solve: 20 x 2 - (10 - 4)

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34

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CCSS.7.NS.A.3

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Back

Sallie is correct.

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CCSS.5.OA.A.1

CCSS.5.OA.A.2

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Solve: 38 + (9 x 6) ÷ 3

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56

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CCSS.7.NS.A.3

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What does it mean to evaluate an expression?

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To evaluate an expression means to calculate its value by performing the operations in the correct order.

Tags

CCSS.6.EE.A.2C

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Back

16

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CCSS.5.OA.A.1

CCSS.5.OA.A.2

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What is a parenthesis used for in numerical expressions?

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Parentheses are used to indicate which operations should be performed first in a numerical expression.

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2