Greatest Common Factor with Prime Factors
Grade 11th Grade · Math · 40 min· Alberta, Canada
What's Included
Learning Objective
I can determine the greatest common factor of two numbers by using prime factorization.
Warm-Up Video
Math with Mr. J · 8:11
How to Find the GCF using Prime Factorization | Greatest Common Factor | Math with Mr. J
Guided Notes
3 key concepts
- 1
The greatest common factor, also known as the GCF, can be found using prime factorization.
- 2
To find the GCF of two numbers using prime factorization, first find the prime factorization of both numbers, then identify the common prime factors, and finally multiply those common prime factors.
- 3
The GCF of 48 and 72 is 24 because they have three factors of 2 and one factor of 3 in common (2 x 2 x 2 x 3 = 24).
Practice Questions
6 questions · Multiple choice & Short answer
Exit Ticket
Quick comprehension check
“Determine the greatest common factor (GCF) of 90 and 126 using prime factorization. Show all steps.”
Complete Lesson Package
Get all 3 ready-to-use resources:
