More with Factor Trees, LCM and GCF!

We were really busy in class today, but we accomplished a lot!!!

We reviewed last night's homework, tried a challenge problem, worked on GCF and LCM word problems and some of us even got to play a LCM game online!

Take a look at the problems and work from class below and then try the snowball game yourself!

Snowball game:

Tonight's homework is to complete both sides of the prime, composite and factorization worksheet.  Numbers 1-9 should just be identifying if the number is prime (only factors are one and itself) or composite (more factors than just one and itself.)  Numbers 10-19 are factor trees just like the examples above and number 20 is like a factor tree in reverse.  I gave you the factorization, use those numbers to figure out what the original number was!

Tomorrow we will spend a bit of time working on factorization, LCM and GCF, but then we will begin multiplying and dividing fractions!  (It sounds scarier than it actually is!)

-Miss K  :)

Greatest Common Factor

We use Prime Factorization to help us determine the Greatest Common Factor of two or more numbers.

First Prime Factorization from "Bob"



Now, use it to find GCF:



Notes from class:

Tonight's homework is to complete both sides of the Factor Tree and GCF worksheet.  Feel free to use your orange paper to help you!

-Miss K  :)

Prime Factorization, GCF and playing games for homework!

Today we began looking at GCF (Greatest Common Factor) and practiced using Prime Factorization to find GCF.

Let's check out some videos.

As you know, tonight's homework is to play online math games!  And now the Games:

Filling in Factor Trees.  Practice doing the factor trees to find GCF.  Choose either (or both) game and practice!

GCF.  Some of these are pretty tough.  Good luck!

Jeopardy.  Factors and Multiples game.  A bit of review along with our new topic.

Fruit Shoot!  Find the GCF on a piece of fruit and shoot it to get points!  Start at level 1 and move up as you improve.

Sketch!  Answer a few questions on GCF and then play level after level of another game.  Try the timed version for a bigger challenge!

Greatest Common Factor.  Practice your skills finding the GCF!

GCF from enspire.  Click Exercises to practice!  This includes a tutorial portion that will reteach the concept if you have any questions.

Practice, practice!  More practice with GCF.

Prime Factorization. From Mr. Glosser's Math Goodies.  Fill in the missing factors. Excellent Practice!

Factorization Forest.  From Mr. Nussbaum's site.  A little tricky to play, but show off your Prime Factorization skills!

And now a Tom Petty cover to help us review...



-Miss K  :)

Review for tomorrow's graded assignment...

Review these practice problems from class below, previous blog posts, as well as your homework sheets on:

• Least Common Multiple (LCM)
• Greatest Common Factor (GCF)
• Comparing and Ordering Fractions
• Converting from Decimals to Fractions and Fractions to Decimals

Prime Factorization  (Thanks to Green class for doing this work!)

Least Common Multiple:

Decimals to Fractions:

Fractions to Decimals:

Comparing Fractions:

Ordering Fractions:

Best of Luck and remember that tonight's HW is to review these concepts!

-Miss K  :)

GCF

Greatest Common Factor.  Today we learned about determining the GCF by listing factors and using prime factorization.  Here are some of the notes from class today.

There is more than one way to get the prime factorization of a number, but the answer will always be the same.

Here's the solution of the first problem on tonight's homework:

By finding the prime factorizations of each number, we can compare what they have in common and use those common values to determine the GCF.  In this case, each value has two 3's in it's prime factorization so 9 (3X3) is the greatest common factor.

Let's watch Bob's video from class today:  Bob!

Another video on GCF:  (This guy has even better upside down writing skills than me!)

I hope that this helps!

Tonight's homework is to complete the GCF worksheet.  There are six problems on the paper and we already did #1 in class (see picture above).  You will be able to skip EITHER #4 or #6 if you would like.  If you would prefer to do all problems (that's awesome) you can do both #4 and #6 in addition to the regular ones.  If you do all six problems and get one wrong, it can still go in the 100's box!  There must be 5 correct problems on your paper to go into the 100 box!

Good luck with the homework!  Have a good night!

It was really nice to see all of you today!  I missed you on Friday!

-Miss K  :)