# 1.5: Connect Variable Expressions and the Order of Operations with Real-World Problems

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Algebraic Expression

An expression that has numbers, operations and variables, but no equals sign.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.Numerical expression

A numerical expression is a group of numbers and operations used to represent a quantity.### Image Attributions

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Description

Learn how to write a real world problem as a variable expression and how to evaluate the expression you have written using the order of operations.

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Date Created:

Dec 19, 2012
Last Modified:

Jan 26, 2017
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