Lesson Objective

Learn how to evaluate expressions by
substituting variables and perform the required
calculations.

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 calculations. 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 calculations. 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 when you are more familiarized with
the steps involved.

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