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Butterfly method for adding and subtracting fractions...genius! Why didn't someone teach me this way?

from Teachers Pay Teachers

Fractions Foldable Decimals Percents Conversion Cheat Sheet

Fraction Decimal Percent Conversion Cheat Sheet and/or Foldable - Math to the Core -

from The Burlap Bag

How to Multiply by 9 Using your Fingers

I don't think i ever knew this... i always used the (ex. 9x3= the number below the # being multipled by 9 .. like 2 then the second number is whatever is added to get 9 ... answer 7)... hope that makes sense lol :)