# GCD/GCF and LCM/LCD

**Greatest Common Divisor/Greatest Common Factor**

Lesson 1: Understanding Common Divisors

Lesson 2: Common Divisors and Greatest Common Divisor

Lesson 3: Exercises on Getting the GCD

Lesson 4: Getting the GCD by Prime Factorization

Lesson 5: GCD and Reducing Fractions to Lowest Terms

**Greatest Common Divisor Tutorial Series (New and Improved)**

Lesson 1: Divisors, Common Divisors, and Greatest Common Divisor

Lesson 2: Finding the GCD of Two ore More Numbers

Lesson 3: Finding the GCD Using the Ladder Method

Lesson 4: The Difference between GCD and GCF

Lesson 5: Finding the GCF by Prime Factorization (without Exponents)

Lesson 6: Finding the GCF by Prime Factorization (with Exponents)

Lesson 7: Finding the GCF by Factor Trees

Lesson 8: Using the GCD to Reduce Fractions to Lowest Terms

**Least Common Multiple **Lesson 1: Least Common Multiple Part 1

Lesson 2: Least Common Multiple Part 2

Lesson 3: Least Common Multiple Part 3

**Least Common Multiple Series (New and Improved)**Lesson 1: Multiples, Common Multiples, and Least Common Multiple

Lesson 2: Finding the LCM Using the Ladder Method

Lesson 3: Finding the LCM Using the Ladder Method – More Examples

Lesson 4: Understanding Least Common Denominator

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