This slide set includes an easy to follow lesson on Order of Operations or BEDMAS. There are also practice questions and answers.

This slide set aligns with the new Ontario Curriculum for 2020:

Grade 5 - C2.2: Variables and Expressions: evaluate algebraic expressions that involve whole numbers

Grade 8 - B2.1: Properties and Relationships: ruse the properties and order of operations, and the relationships between operations, to solve problems involving rational numbers, ratios, rates, and percents, including those requiring multiple steps or multiple operations