Equivalent Fractions

Presentation by Callie Carroll and Jo Dixonwww.dositey.com/worksheet/ frac2.html

mason.gmu.edu/~mmankus/talks/ frdecprt/frdecprt.htm

Equivalent

• Definition: equal in amount or value

• Pieces are the same size and shape ONLY they are cut up differently.

• “Looks the same!”

• “Equivalent” looks a little bit like the word “equal”

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I Want No Part of Fractions

I want no part of fractionsThey onl y bring me grief.Half the time on the quarter quizI can't explain what one eighth is.

It took math teachers to decideThat we'll divide them side by side.They say it works, I don't know whyYou turn one over and multiply.

I think the world's worst agitatorIs the smallest common

denominator.You need 'em to add, it drives you

silly,But multiplying is willy nilly.

I may be bad but here's the topper:They say my fractions are improper.My dreams of success are cast asunder--My number above is bigger than under.

Tell me, folks, ain't it absurd?One half is bigger than one third!Why, back in first grade we all knew:A three is larger than a two.

Math teachers find it so amusingThat learning fractions is confusing.Why, we could learn this stuff real fineIf they'd take out that silly line.

—Grandpa TuckerCopyright ©1998 by Bob Tucker

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Review

• Halves

• Thirds

• Fourths

• Fifths

• Sixths

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Explanation

• Common denominator• Factors• Patterns• Draw a picture• Fraction bars

www.harcourtschool.com/.../gr3/ equivalent_fractions3.htm

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Example

• Equivalent fractions can be found in toys you have at home!

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Example

• Shapes can be divided into fractions many different ways. Can you find the equivalent fractions shown in this picture?

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Example

• Hint: Common factors• How are these fractions equivalent?

www.mathstutor.com/ Fractions.htm

Example

• Coloring the pieces may help you see the equivalent fractions.

www.coolmath4kids.com/lessons/ fractions4_main.htm

Real World Connection

• Fractions are all around us!• Can you think of an example of

fractions in the world around you?www.ed.gov/pubs/EarlyMath/ whatis.html

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Think about it!

• What would the world be like without fractions?