20/20 Primes and Factor Trees

A power learning aid combines Coaching Calculators and Guides to help students master prime factorization, LCM and GCD.

Prime factorization :

- Prime factorization by factor trees

LCM or Least Common Multiple :

- LCM by prime factorization

- LCM by listing multiples

GCD or Greatest Common Divisor :

- GCD by prime factorization

- GCD by listing divisors

You develop understanding quickly as you work with the calculator and see each step of the process in detail.