This shows disadvantaged students in special education programs & special education with special needs the difference between multiples and factors as well as what to watch for when calculating LCM & GCF.

Demystifying Algebra: Mastering GCF and LCM

Welcome to an empowering journey through algebraic concepts with me, Professor Ehimwenma E. Aimiuwu, an experienced educator dedicated to demystifying math. In this tutorial series, I guide learners from grades 7 through 12 through the intricacies of algebra, making complex topics like the Greatest Common Factor (GCF) and Lowest Common Multiple (LCM) accessible and engaging.

I’m Professor Aimiuwu, a passionate math teacher with over a decade of experience in the field. My mission is to instill confidence in students and break down barriers to understanding math. With a dynamic teaching style and a knack for simplifying complex concepts, I’ve inspired countless learners to embrace the beauty of mathematics.

Greatest Common Factor:

Let’s dive into the basics. The Greatest Common Factor (GCF) is a fundamental element of algebraic problem-solving. It represents the largest number that divides evenly into two or more given numbers. Understanding the GCF is crucial for simplifying fractions, solving equations, and factoring polynomials.

To find the GCF of two or more numbers, we identify all the factors shared by those numbers and determine the largest one. For example, the GCF of 24 and 36 is 12 because 12 is the largest number that divides evenly into both 24 and 36.

I’ll walk you through a variety of examples, demonstrating how to find the GCF using different methods such as listing factors, prime factorization, and the ladder method. For instance, when finding the GCF of 18 and 30, we can list the factors of each number (18: 1, 2, 3, 6, 9, 18; 30: 1, 2, 3, 5, 6, 10, 15, 30) and identify the largest common factor (6).

Understanding the GCF is essential in simplifying fractions and solving equations. By identifying the GCF, learners can reduce fractions to their simplest form, making calculations more manageable. Additionally, factoring polynomials becomes easier when one can identify common factors, leading to efficient problem-solving in algebraic expressions and equations.

Lowest Common Multiple:

Next, let’s explore the concept of the Lowest Common Multiple (LCM), another crucial aspect of algebraic equations. The LCM represents the smallest multiple that is divisible by two or more given numbers. Understanding the LCM is essential for adding and subtracting fractions, solving word problems, and finding common denominators.

To find the LCM of two or more numbers, we identify the multiples of each number and determine the smallest one they have in common. For example, the LCM of 4 and 6 is 12 because 12 is the smallest number that is divisible by both 4 and 6.

I’ll demonstrate various methods for finding the LCM, such as listing multiples, prime factorization, and the ladder method. For instance, when finding the LCM of 8 and 12, we can list the multiples of each number (8: 8, 16, 24, 32, …; 12: 12, 24, 36, …) and identify the smallest common multiple (24).

Understanding the LCM is crucial in adding and subtracting fractions with different denominators. By finding the LCM, learners can determine a common denominator and perform operations on fractions accurately. Additionally, the LCM is valuable in solving word problems that involve finding the least common multiple of multiple quantities or events.


Join me in this empowering journey through algebra, and unlock the keys to mathematical success. With dedication and practice, you can master essential concepts like the GCF and LCM, gaining the skills and confidence needed to excel in math. Let’s break down stereotypes and embrace the power of education together, inspiring positive change in our communities.