Lesson Objective

Learn the basics behind evaluating expressions by
substituting variables and perform any required
calculations.

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About This Lesson

From the lesson algebra variables, you know that a variable is used to represent a certain number.

Therefore, you can evaluate an expression by substituting the each variable in the expression with its given number and perform the required calculation. This lesson shows you how.

Therefore, you can evaluate an expression by substituting the each variable in the expression with its given number and perform the required calculation. This lesson shows you how.

Tip #1

Remember to include brackets around the
substituted variable. These brackets help to minimize
calculation mistakes.

Tip #2

It is better to substitute the variables in the
expression one at a time. You can substitute the
variables all at once only when you have already familiarized with
the steps involved.

Math Video Transcript

Multiple Choice Questions (MCQ)

Now, let's try some MCQ questions to understand
this lesson better.

You can start by going through the series of questions on evaluating expression or pick your choice of question below.

You can start by going through the series of questions on evaluating expression or pick your choice of question below.

- Question 1 on the basics
- Question 2 on the basics

Site-Search and Q&A Library

Please feel free to visit the Q&A Library. You can read the Q&As listed in any of the available categories such as Algebra, Graphs, Exponents and more. Also, you can submit math question, share or give comments there.

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