In this AoPS thread you can find multiple extremely fast ways to calculate \(9+27\). http://www.artofproblemsolving.com/Forum/viewtopic.php?f=224&t=572612

I've used this thread multiple times to prepare for AIME, so I would recommend you guys check it out.

You can post your favorite way to calculate \(9+27\) in the comments below if you want.

Have fun! ^_^

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## Comments

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TopNewest36 ..........

27 + 10 -1

37-1

36

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Yes, me too!

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\(9*4 = 36\) ....Definitely my favorite :D

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9 * 3^3 =36

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3^2+3^3=36

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First i add 3 to 27 that makes 30 then i add remaining 6 to it

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7*2=14+2+20 really fast in my mind

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