Prime Factorization

Created by

Cristina Salas Leal

November 16, 2007

Objective

The students will learn to use a factor tree to find the prime factorization of a composite number.

TEKS (6.1D) The student will write prime factorizations using exponents.

Math Journal

Write and answer the following questions in your math journal.

Using only one word, how would you define a prime number?

Using only one word, how would you describe a composite number?

What is prime factorization?

What is Prime Factorization?

Prime factorization breaks down a number into its prime factors.

Prime & Composite

A prime number is a number with exactly two unique factors.

A Composite number is a number with more than two factors.

Factor Tree

12

6 2

2 3

Prime Factorization of 12 = 2 x 2 x 3

Step 1: Start with a composite number

Step 2: Factor the number

Step 3: Continue factoring composite factors

Internet Website

Visit this website to learn more about Prime Factorization and then take the quiz.

BrainPOP – click here

Practice finding the Prime Factorization using a factor tree

Watch a video clip – Prime Factorization Video ClipFactor Tree – NLVM

Solve problems using the this interactive website.

Thank you