20/20 Primes and Factor Trees app for iPhone and iPad

4.2 ( 1312 ratings )

Reference Education
Developer: Walter Kissach

0.99 USD

Current version: 9.0, last update: 8 months ago
First release : 18 Dec 2008
App size: 1.97 Mb

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.