GCF and Distributive Property Lesson

Step 1 - Find the prime factors of both numbers by using a prime factor tree.

Step 2 - Line up the prime factors horizontally.

Step 3 - Circle the prime factors that both numbers have in common (hence, greatest COMMON factor). The common prime factor is the GCF.

Step 4 - If there is more than one common prime factor, take one number from each of those common pairs and multiply them together to get your GCF. If there is no common factor, the GCF of the two numbers is 1.

Step 1 - Find the prime factors of both numbers by using a prime factor tree.

Step 2 - Line up the prime factors horizontally.

Step 3 - Circle the prime factors that both numbers have in common and box the remaining numbers.

Step 4 - To calculate the LCM, take one number from the common pairs and multiply them with the box numbers.