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• retrieved M, 10/20/14: Butterfly Fractions = "Adding and Subtracting Fractions with the Butterfly Method"

• Butterfly method for adding and subtracting fractions...genius or heinous? This is just an algorithm not a way to help them understand fractions. Great along WITH other methods but please not alone, middle school math teachers beg this of you!

• Butterfly method for adding and subtracting fractions. Neat, but background on WHY it works needs to be taught! :)

• (Math- fractions) Butterfly method for adding and subtracting fractions

• Butterfly method for adding and subtracting fractions... It took me a minute to understand, and I'd love to hear a math teachers thoughts, but it looks cool.

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