In this video, we will be learning how to use the order of operations (PEMDAS) in word problems involving substitution.
Substitute first into parenthesis:
Evaluate the exponent:
Let’s go over the order of operations with substitution.
We all know that it is PEMDAS.
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 PEMDAS.