How to Multiply by 11 Like a Super Genius

Multiplying by 11 like a savant is easy if you know how to add! #mathtricks #mathtrick #maths #mathematics #mathshorts
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[@AubreyForever]

Graduated in Math at the U of Washington years ago. It is fun to learn these.

[@WrathofMath]

Absolutely! I was most into the speed arithmetic as a kid, but a lot of the tricks have stayed with me and so they're always fun to bust out

[@rasmust8044]

is this not just not the common way i have done this since i started counting?

[@WrathofMath]

I don't know, is it?