Curriculum placement
Grade 6. This describes the skill, not a learner estimate.
Greatest common factor and least common multiple
Find greatest common factors and least common multiples
Problem types
- Greatest common factor
- Least common multiple
- Factor out the greatest common factor
Builds on
Leads to
- Factoring quadratic expressions
- Adding and subtracting unlike fractions · See it applied
The least common multiple of two denominators is the least common denominator for adding unlike fractions.
- Operations on rational expressions · See it applied
Adding rational expressions uses the least common multiple of the denominators, and simplifying uses the greatest common factor.
Related skills
- Fluent whole-number division · Related idea
Repeated division with remainders finds the greatest common factor of two numbers.
Open the interactive map to explore lessons and skill connections.