1. Least Common Multiple and Greatest Common Factor#5

2. VOCABULARY
-Whole numbers that are multiplied to find a product are called factors of that product. A number is divisible by its factors.
-Factors shared by two or more whole numbers are called common factors. The largest of the common factors is called the greatest common factor, or GCF.
-The smallest number that is a multiple of two or more numbers is the least common multiple (LCM).

3. I DO (foldable)

4. I DO (foldable) What is the greatest common factor (GCF)of 15 and 20?
List the factors of 15 and 20
15: 1, 3, 5, 15
20: 1, 2, 4, 5, 10, 20
The GCF is 5
2) What is the least common multiple (LCM) of and 12?
List the multiples of 7 and 12
7: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84
12: 12, 24, 36, 48, 60, 72, 84
The LCM is 84

5. WE DO (notes)

6. ADV LCM and GCF puzzle REG YOU DO (classwork)
Greatest common factor explained
Least common multiple
GCF & LCM word problems