# 1.4: Evaluate Numerical and Variable Expressions Using the Order of Operations

Difficulty Level:

**Basic**Created by: CK-12Estimated24 minsto complete

%

Progress

**Practice**Order of Operations

MEMORY METER

This indicates how strong in your memory this concept is

Practice

Progress

Estimated24 minsto complete

%

Estimated24 minsto complete

%

Practice Now

MEMORY METER

This indicates how strong in your memory this concept is

Turn In

### Notes/Highlights Having trouble? Report an issue.

Color | Highlighted Text | Notes | |
---|---|---|---|

Show More |

Brackets

Brackets [ ], are symbols that are used to group numbers in mathematics. Brackets are the 'second level' of grouping symbols, used to enclose items already in parentheses.Equation

An equation is a mathematical sentence that describes two equal quantities. Equations contain equals signs.Evaluate

To evaluate an expression or equation means to perform the included operations, commonly in order to find a specific value.Expression

An expression is a mathematical phrase containing variables, operations and/or numbers. Expressions do not include comparative operators such as equal signs or inequality symbols.Grouping Symbols

Grouping symbols are parentheses or brackets used to group numbers and operations.nested parentheses

Nested parentheses describe groups of terms inside of other groups. By convention, nested parentheses may be identified with other grouping symbols, such as the braces "{}" and brackets "[]" in the expression . Always evaluate parentheses from the innermost set outward.Numerical expression

A numerical expression is a group of numbers and operations used to represent a quantity.Parentheses

Parentheses "(" and ")" are used in algebraic expressions as grouping symbols.PEMDAS

PEMDAS (Please Excuse My Daring Aunt Sally) is a mnemonic device used to help remember the order of operations: Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.Real Number

A real number is a number that can be plotted on a number line. Real numbers include all rational and irrational numbers.Variable

A variable is a symbol used to represent an unknown or changing quantity. The most common variables are a, b, x, y, m, and n.Variable Expression

A variable expression is a mathematical phrase that contains at least one variable or unknown quantity.### Image Attributions

Show
Hide
Details

Description

Learn to use the order of operations to solve numerical and variable expressions.

Learning Objectives

None

Related Materials

Difficulty Level:

Basic
Subjects:

## Concept Nodes:

Grades:

Date Created:

Dec 19, 2012
Last Modified:

Aug 11, 2016
Vocabulary

None

Files can only be attached to the latest version of Modality