This lesson focuses on finding the prime factorization for composite numbers, and using it to find the GCF, LCM, and LCD. Students begin by identifying prime and composite numbers. They find prime factorizations and write them in exponential form. Students then find the greatest common factor (GCF) and least common multiple (LCM) of two composite numbers. Students end the lesson by using the GCF to simplify fractions and to find the lowest common denominator (LCD) to write equivalent fractions.

Originally released by Learnetic, 2016.