Grade 4 - Multiplication - Visualization of Prime and Composite Numbers

In this video, we explore the concepts of prime and composite numbers, emphasizing their importance in grade four math curricula. A prime number has only two factors—1 and itself—while a composite number has more than two factors. We demonstrate how students can use the area model to visually prove whether a number is prime or composite by attempting to create different rectangular arrays.

This method reinforces the understanding that prime numbers can only form one rectangle, whereas composite numbers can form multiple rectangles, showing their multiple factors. This visual approach helps solidify students' comprehension of these fundamental concepts in multiplication.