Substitution

What is substitution?

Substitution involves replacing pro numerals in an algebraic expression with numbers. The steps on how to complete substitution in Prelim Standard Math are as follows:

1. Write the algebraic expression
2. Replace the variables in the expression with the numbers given in the question
3. Evaluate using the calculator
4. Write the answer to the specified level of accuracy and correct units if necessary

How to solve algebraic expressions by first substituting pro numerals for numbers

The videos below explain how to solve algebraic expressions by substitution.

Part 1

Part 2

If you’re still struggling with the concept of substitution here is an easier video that helps explains the steps of substitution!