Idempotent

This activity presents calculating the GCF and LCM of two positive integers using set diagrams of the prime factors. It begins with a review of prime factorization and prime factor trees. The skill of calculating the GCF is immediately followed by an application to reducing fractions. The skill of calculating the LCM is immediately followed by an application to adding fractions. The activity touches on the set operations of union, intersection, and complement without introducing the technica