Algebra 1 · Factoring
Greatest Common Factor
Algebra 1 · Factoring
Definition
The greatest common factor is the largest factor shared by all terms of an expression.
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
Examples
- The GCF of 12x and 18 is 6.
- The GCF of 4x2 and 6x is 2x.
Key rule
Factor out the GCF before any other factoring.
Memory hook
GCF = the biggest piece every term shares.