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CK-12 Foundation
Ck 12: Arithmetic: A Number as a Product of Its Prime Factors
[Free Registration/Login may be required to access all resource tools.] Write the prime factorization of given numbers.
Mangahigh
Mangahigh: Number: Prime Factoring
Explore prime factors and what the missing exponent could be.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Prime Factorization
Find a quick, concise explanation of how to find the unique prime factorization of a number. An example is given and clearly explained.
Shmoop University
Shmoop: Basic Operations: Prime Factorization
Students learn about prime factorization. The resource consists of notes, step-by-step examples, and practice problems with solutions.
McGraw Hill
Glencoe: Self Check Quizzes 1 Prime Factors
Use Glencoe's randomly generated self-checking quiz to test your knowledge of prime factors. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the "Check It" button and...
Homeschool Math
Homeschool Math: Prime Factorization of Three Digit Numbers
This lesson shows examples of how to get started with the prime factorization of three-digit or larger numbers, using a factor tree. includes numerous practice exercises.
Doina Popovici
Math Play: Prime Factorization Game
Students can practice prime factorization in this online game that can be played individually or in teams.
Cool Math
Coolmath: Pre Algebra: Prime Factorizations
In this tutorial, students learn how to do prime factorization by a few different methods, including factor trees and factor stacks. The exercises work their way up from 2-digit numbers up to 5 digits. Includes practice problems.
Calculator Soup
Calculator Soup: Prime Factorization Calculator
Use this prime numbers calculator to find all prime factors of a given integer number up to 1 trillion. This calculator presents prime factors of a number, prime decomposition in exponential form, CSV (comma separated values) list of...
Other
University of Tennessee: The Prime Pages
Here you can find a detailed searchable database of the 5000 largest known primes! Content also includes a glossary, a top 10 records list, prime-music, programs, free downloads, and much more!
Paul Dawkins
Paul's Online Notes: Algebra: Preliminaries: Factoring Polynomials
Detailed math tutorial features notes and examples that illustrate how to factor polynomials. It discusses factoring out the greatest common factor, factoring by grouping, factoring quadratics, and factoring polynomials with degree...
Doina Popovici
Math Play: Prime Factorization Game
Students can practice factorization in this online game.
Math Medics
S.o.s. Math: Factoring Integers
This S.O.S. tutorial gives students a basic review of factoring integers. Follow the tutorial to refresh your skills involving the rules for factoring numbers. Contains practice problems with links to the answers.
Purple Math
Purplemath: Factoring Numbers
Visit Purplemath.com for a lesson on finding the prime factorization of numbers. Numerous examples are worked through step by step.
ClassFlow
Class Flow: Working With Prime and Composite Numbers
[Free Registration/Login Required] This flipchart allows students to practice working with prime and composite numbers. Students learn how to do prime factorization.
Texas Education Agency
Texas Gateway: Applying the Order of Operations
Given a numerical expression including whole number exponents and prime factorization, students will use the order of operations to generate an equivalent expression.
Math Planet
Math Planet: Factorization and Prime Numbers
Gain an understanding of how to factor prime numbers by viewing examples and a video lesson.
Other
Help With Fractions: Prime Numbers Chart
Prime and composite numbers are defined on this website. A prime number chart is also included for all prime numbers under 10,000.
Wyzant
Wyzant: Prime Factors Calculator
Students input a number to be factored and the WyzAnt calculator does the rest. Limitations include the fact that numbers which are negative or which contain primes bigger than 541 cannot be handled.
University of Waterloo (Canada)
Wired Math: Primes and Prime Factors [Pdf]
Explore primes, prime factors, and composites using this collection of worksheets. Lots of detailed examples, interesting math facts, and colorful visuals. Acrobat Reader required.
ClassFlow
Class Flow: Factoring, Prime and Composite
[Free Registration/Login Required] This flipchart defines factors, prime number, and composite numbers. It gives step-by-step instructions on how to list all the factors of a whole number and then identify the number as a prime number or...
University of Vienna (Austria)
University of Vienna: Elementary Properties of Numbers
Quick interactive assessment which determines skill level on fraction equivalence, prime factorization, and common divisors/multiples.
Texas Instruments
Texas Instruments: It's Greek to Me
Students learn Euclid's Method of finding the Greatest Common Factor of large numbers. They also review finding GCF using prime factorization and listing.
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