Home
#### Algebra and Pre-Algebra Lessons

Algebra 1 | Pre-Algebra | Practice Tests | Algebra Readiness Test
#### Algebra E-Course and Homework Information

Algebra E-course Info | Log In to Algebra E-course | Homework Calculator
#### Formulas and Cheat Sheets

Formulas | Algebra Cheat Sheets

Home » Pre-Algebra Lessons » Using PEMDAS

# Using PEMDAS to Evaluate Numerical Expressions

## Example 1 - Nested Parenthesis

Do you remember PEMDAS? In the previous lesson, we discussed the basic rules for evaluating using numerical expressions using the Order of Operations. We looked at the acronym PEMDAS and how it helps us to remember the rules when using the order of operations. In case you've forgotten, let's review:

In the next few examples, we are going to focus on other grouping symbols other than parenthesis. A ** grouping symbol** is used to indicate that operations contained within should be computed separately from other operations in the expression.

First we will take a look at ** nested parenthesis** which are parenthesis that are "nested" inside another set of parenthesis. In this case, you must always work the inner most parenthesis first. In other words, always work from the inside out. Take a look....

In the next example, we are going to take a look at the fraction bar. The fraction bar is also considered a grouping symbol. The fraction bar groups together the terms that are in the numerator and the terms that are in the denominator. Take a look....

Often times, we use the slash instead of the fraction bar. You must be very careful with this symbol in math. Take a look at this tip:

Our last grouping symbol is the **radical sign**. The radical sign tells us that we want to take the square root of a number. We treat the radical symbol as a grouping symbol, and therefore, we must evaluate the expression (using PEMDAS) inside of the radical before taking the square root.

The concludes our lesson on using the order of operations to evaluate numerical expressions.

Sign Up for Algebra Class E-courses

Click here to retrieve a lost password.

Custom Search

- FREE Solving Equations E-course
- Algebra Class E-course
- Algebra Class Products
- Algebra Practice Test
- Algebra Readiness Test
- Homework Answer Calculator
- Practice Worksheets

- Site Map
- Pre-algebra Refresher
- Solving Equations
- Graphing Equations
- Writing Equations
- Systems of Equations
- Inequalities
- Functions
- Exponents & Monomials
- Polynomials
- Quadratic Equations
- Algebra 1 Final Exam

- SAT Online Course
- Algebra Cheat Sheets - Very Popular!!
- Algebra Formulas
- Online Resources
- Contact Me
- I Want to Hear From You!
- Algebra Blog
- About Me

Copyright © 2009-2015 Karin Hutchinson ALL RIGHTS RESERVED

## Comments

We would love to hear what you have to say about this page!