In this video, we will be learning how to use order of operations (**PEMDAS**) in word problems involving substitution.

For example:

Let

Substitute first into parenthesis:

Evaluate the exponent:

Multiply:

Addition/Subtraction:

Simplify:

## Video-Lesson Transcript

Let’s go over order of operations with substitution.

We all know the order of operations is PEMDAS.

Parenthesis

Exponent

Multiplication

Division

Addition

Subtraction

For example:

Let , , and

In order to evaluate this, we have to substitute these values using parenthesis.

Let’s solve the exponent part first.

Then, let’s multiply.

Now, our answer is .

So the key is to substitute using parenthesis. Then follow the rules in order of operations.

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