Addition, Subtraction, Multiplication and Division - Common Factors - Presentation

Delving into the realm of factors, Lesson 20 of the maths curriculum presents an opportunity for students to explore and identify common factors of various number pairs. The lesson encourages a clear understanding of the difference between factors and multiples, prompting a class discussion to distinguish the two concepts. With a focus on the 'Four Operations' strand, students are tasked with finding common factors for pairs of numbers such as 24 and 36, 20 and 30, and 28 and 45. The lesson provides a systematic approach to ensure all factors are considered, and students are given the chance to practice this skill through a series of engaging activities.

Further enhancing their critical thinking, students are presented with a reasoning challenge where they must identify the odd one out from a list of numbers based on common factors. For example, they determine that 32 is the odd one out among numbers like 12, 30, and 54, as it lacks the common factor of 6. The lesson also incorporates practical applications, such as dividing a set of pears and oranges into baskets, where students use their knowledge of common factors to solve real-world problems. Additionally, the lesson touches on how Venn diagrams can visually represent common factors, providing a comprehensive approach to understanding this fundamental mathematical concept.