Fraction Butterfly Anchor Chart - cross multiply to find equivalent fractions to compare fractions or add & subtract fractions with different denominators. A visual reminder of the strategy for adding & subtracting fractions found in the CCSS 5.NF.A.1 (a/b + c/d = (ad + bc)/bd). See http://www.corestandards.org/Math/Content/5/NF/A/1/. This is not intended to be taught on its own, but can serve as a reminder after the concepts that explain why this works have been taught.

Mrs. White's 6th Grade Math Blog

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PEMDAS or order of operations

Multiplying fractions

Nine simple math tricks you’ll wish you had always known

Butterfly Fractions. Another way how to learn how to add and subtract fractions with unlike denominators.

Classroom Freebies: Prime and Composite Numbers Freebie

Division of Polynomials (INB p. 48-49) | Nonstop Precalculus Fun

My 7th grade math teacher had this exact sign when she taught us. I can never solve these equations without seeing it in my head...even 8 years later!