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Adding Fractions with Unlike Denominators

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Adding Fractions with Unlike Denominators

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Notes

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Class Notes

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Song

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Tune song to Row Row Row...

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Boats and boating--Equipment and supplies

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Math Antics | Basic Math Videos and Worksheets

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(Sing to the tune Deck the Halls)

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Common Factor and Greatest Common Factor (GCF) 

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Common Factor and Greatest Common Factor (GCF) 

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Prime Numbers Rap Song Typography (Math)

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List of Prime Numbers 1-100

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Finding out if numbers are Prime or Composite

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Up to the Millions Place

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Partial quotient

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Greater than or Less than

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How to graph an order pair

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Watch three friends vocalize together in this rap song about dividing fractions with the keep, change, flip method. Dividing a fraction by another fraction has never been so fun and easy to understand as they break down the meaning behind keep, change, flip, and show that even though it is a trick, it's not magic... it's mathemagic!

Song Lyrics:

CHORUS:
To divide by a fraction here's a tip: KEEP, CHANGE, FLIP!
To divide by a fraction here's a tip: KEEP, CHANGE, FLIP!

To divide one half by one sixth: KEEP, CHANGE, FLIP!
one times six is six, and two times one is two
it's an improper fraction; so we're not through.
Divide six by two and the quotient is three.
Keep, change, flip - it's all that you need.

(CHORUS)

To divide two fifths by one fifth: KEEP, CHANGE, FLIP!
Two times five is ten, and five times one is five;
it's an improper fraction, so you need to divide.
Ten divided by five equals two.
When we divide by fractions this is what we do!

(CHORUS)

"Keep - change - flip" may seem to work magically,
but it can be explained mathematically.
With the number ten, we can divide by two,
and that will leave five in each group...
Or we can find that "five" through a different path
by multiplying ten by two, "flipped" to one half.
It's the trick that never fails called "keep - change - flip."
It's real mathemagic, so use this tip!

We understand with ease these problems we love,
because we know "division" means:
"...has how many groups of..."

Let's explore that thought:
How many groups of "fourths" does one half got?
Two "fourths" fit into one half perfectly,
and we found the quotient mentally!

(DOUBLE CHORUS)

Learn More

This song targets TEKS and Common Core learning standards from both 5th Grade and 6th Grade. Look into the relevant standards here, or dig deeper into dividing fractions here. Or click here to get a conceptual/visual understanding of why one can Keep, Change, and Flip when dividing fractions as a means of obtaining the right answer.

If you are interested in getting ideas on how to plan a robust standards-aligned telling time lesson, we recommend checking out Instructure's recommendations for common core standards 5.NF.B.7, and 6.NS.A.1 . These pages help break down standard language, lay out the grade-appropriate level of rigor for each concept, and offer a variety of suggestions for activities (lesson seeds) that help students achieve their learning targets.

To continue browsing Numberock's math video content library, click here. To gain access to Numberock's growing library of premium content, click here.

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Keep, Change, Flip Video | Dividing Fractions by NUMBEROCK

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What better way to learn about the Keep, Change, Flip method to divide fractions than through an extremely catchy song!

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Reference Materials

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Notes to a Grid Paper

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English and Spanish

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5th Grade Math Personal Financial Literacy - Budget

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5th Grade - Math - Understanding Finance - Topic Overview

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Box Method Division | 3-Digits Divided by 2-Digits | Math with Mr. J