## Prime Factorization

Let's first review just what prime and composite numbers are!

Drag-It : A simple, drag the number to

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Now that you've reviewed prime and composite numbers let's look at prime factorization.

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Watch this video to learn a NEW way to find out how to use it. Be able to do both ways as a quiz

we will have will ask you do show GCF both ways

She goes over the traditional way to find a short problem.

But then she shows this REALLY COOL way that I like a lot! Learn it!

that you have to keep going until you get prime numbers on

the bottom row.

especially the part about the circle map.

especially with larger numbers.

shows how to find the LCM of 3 numbers.

The next 3 may not work on our school machines

ACTIVITIES

Go all the way to the bottom of this page to find the problems.

Have 1 partner solve for the LCM one way and the other partner solve it a different way.

Compare answers.

The Pirate Game - A review game on least common multiples.

Factor Feeder - a PacMan like game on factors.

Side by Side Factors - Read the short directions before clicking on the "tan" Play Now button.

**1. Prime and Composite Numbers****Math Playground Video**on Prime & Composite Numbers- Math Playground has really good way of shoing prime and composite numbers.**School Tube Video**- helps define prime and composite factors.**Math Rocks**- A musical explanation of prime and composite numbers.**Watch Known Learn Video**for one last video on prime and composite numbers.**INTERACTIVE GAMES:**Drag-It : A simple, drag the number to

**Turkey Shoot**: Using keys on your keyboard, you'll have to move around to shoot the answer.**King Kong's Prime Numbers**: How many points can YOU get?**Fruit Shoot**: A fun activity with a number of settings for you to choose. Choose time or untimed mode.**Math-Play Prime & Composite Game**: This multiple choice activity gives you points for your responses........................................................................................................................................................................

**2. Prime Factorization**Now that you've reviewed prime and composite numbers let's look at prime factorization.

**Math Playground Video**A very good explanation of how to use factor trees to find prime factorization.**Math Train Video**A 6th grader explains prime factorization. You'll get to use your exponent skills too!

**INTERACTIVE GAMES:****Factor Tree Practice**: This is a great activity to practice using factor trees to find the prime factorization of a number.**Prime Shooter**- A complex shooting game. You'll need to read the instructions...**QUIZ**-.......................................................................................................................................................................

**3. Greatest Common Factor (GCF)****Math Playground Video**A very good explanation of how to find the greatest common factor of a number**School Tube Video**This is an EXCELLENT video. It shows TWO WAYS to come up with the greatest common factor.Watch this video to learn a NEW way to find out how to use it. Be able to do both ways as a quiz

we will have will ask you do show GCF both ways

**Greatest Common Factor**: Memory Game**Math Gal Video**This teacher shows 2 ways to find the GCF of a number.**INTERACTIVE GAMES:**

**GCF Drag it**- drag the answers to the proper location**Sketch's World - Choose the Greatest common factor****Math Nook****- This site has an option to work with either GCFs or LCMs.****Don't be confused, it uses the term Greatest Common Divisor instead of Greatest Common Factor.****Pyramid Math : You'll have to select either****the GCF****or LCM options. There is also an easy and hard level choice.****.......................................................................................................................................................................**

**Factors & Multiples****: A Jeopardy game.****4. Least Common Multiple (LCM)****I will be looking for you to be able to find the LCM by at least 2 different methods.****Watch and if necessary RE-watch these videos so that you can solve any problem with****- Either the Traditional Method or the Upside Down Birthday Cake or the Indian Method.****LCM with Schooltube- The teacher shows how to find the LCM of 2 numbers and adds a short cut too.****This is one of the more traditional ways to find the LCM****LCM using the L technique**- This teacher talks fast, but does a great job of explaining just what the LCM is.She goes over the traditional way to find a short problem.

But then she shows this REALLY COOL way that I like a lot! Learn it!

**LCM with Up Side Down Birthday Cake Method**- I didn't name this method. Watch the examples rememberingthat you have to keep going until you get prime numbers on

the bottom row.

**LCM Explained by a Middle School Student**- You may need to watch this a couple of times,especially the part about the circle map.

**Upside Down Birthday Cake Method with Bigger Numbers**- This shows how this method is a good oneespecially with larger numbers.

**The Indian Method to find BOTH GCF & LCM**- Similar to the upside down birthday cake, this methodeshows how to find the LCM of 3 numbers.

The next 3 may not work on our school machines

**Math Gal Video**Part 1 A good intro to finding Least Common Multiples.**MatH Gal Video**Part 2**Math Gal Video**Part 3 This video solves a number of "example" problems.ACTIVITIES

**Try these 5 problems**- Work with a partner on this one.Go all the way to the bottom of this page to find the problems.

Have 1 partner solve for the LCM one way and the other partner solve it a different way.

Compare answers.

**INTERACTIVE GAMES:****Snowball Fight**- Find the Least Common Multiple**Math Nook****- This site has an option to work with either GCFs or LCMs.****Don't be confused, it uses the term Greatest Common Divisor instead of Greatest Common Factor.**

**Pyramid Math : You'll have to select either****the GCF****or LCM options. There is also an easy and hard level choice.****Factors & Multiples****: A Jeopardy game.**The Pirate Game - A review game on least common multiples.

Factor Feeder - a PacMan like game on factors.

**xFacto**r - (This may not work at TMS) Try it at homeA strategy game using factorsSide by Side Factors - Read the short directions before clicking on the "tan" Play Now button.