Evaluating Algebraic Expressions | Math Lesson

What happens when you use an algebra rule with real numbers? In this Grade 8 math lesson, students learn how to evaluate algebraic expressions by substituting values and following the order of operations. Through everyday examples like snack sales and bike rentals, students practice replacing variables with numbers to calculate results. The lesson emphasizes that evaluating is not guessing—it’s applying a rule to a specific situation and interpreting the result. Students also explore expressions that lead to negative values and learn what those results mean in context. 📚 Aligned with Grade 8 Ontario Math – Algebra ✏️ Learning focus: Evaluating algebraic expressions 🔢 Key concepts: Substitution, order of operations, variables Watch now to see how algebraic expressions work when numbers are added in.