1. Factors & Multiples Lesson 1 - Factors & GCF
I can list factors of a number
I can find the greatest common factor of two whole numbers.
Warm Up:
What is a factor?

2. Finding Factors
Make a
A factor rainbow is a way of showing factor pairings. (two whole numbers whose product is that factor)
What number is each rainbow a factor for?
Factor

3. Greatest Common Factor
Example: Find the GCF of 24 and 36. Steps: 1) Make a factor rainbow for each number 2) Circle the GREATEST number that they have in common, that is your GCF.

4. Find the GCF for each pair of numbers.
20: 36: 15: 60: 72: 56:

5. Lesson 2 – Prime Factorization
I can make a factor tree to show prime factorization.
Warm Up
What is a prime number? Composite?
Factor Tree Notes

6. Lesson 3 –Multiples. I can list the multiples of a whole number
Lesson 3 –Multiples * I can list the multiples of a whole number. * I can find the least common multiple of two whole numbers.
Warm Up - What is a multiple? (P. 145)

7. LCM
Example: Find the least common multiple of 6 and 9. Steps: 1) List the multiples of each number. Multiples of 6: 6, 12, 18, 24, 30, 36……. Multiples of 9: 9, 18, 27, 36…………….. 2) Circle the smallest number that they have in common. 18, that number is the least common multiple.

8. Practice! LCM & GCF Cheat Sheet GCF: Factor Rainbow
Prime Factorization: Factor Tree
LCM: List multiples