Today we looked at how to use Prime Factoring to find the LCM (Lowest Common Multiple) and GCF (Greatest Common Factor) of two numbers.
For example
8 = 2 x 2 x 2
12 = 2 x 2 x 3
Their GCF 4. It is the product of the prime factors they have in common 2 x 2
Their LCM is 24. It is the product of the prime factors they share (2 x 2) times all of the factors they don't share (x 2 x3). So their LCM is 2 x 2 x 2 x 3
Homework: 1.3 Questions #1 and #2.
1.1 and 1.2 are overdue.
