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Fun Math Trick! Squaring Numbers Near 100

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Published on Aug 24, 2009

Fun Math Trick! Squaring Numbers Near 100.
A neat way to square numbers near 100 without having to multiply it out the long way!
For more free math videos, visit http://PatrickJMT.com

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Comments • 93

Mazin Hattab
Instead of using this method, doing ordinary calculations with logic is more usefull. I just tested doing the first one, (106)^2. It can be rewritten as (100+6)^2=(10000+1200+36) =11236. Then you dont have to remeber this thing he did because you can use your another method.
live and love
I have got my mind burst man,, cool and awesome...... GENIUS
Geeta Devi
awesome
Elisabeth Ranné
wow that trick is so cool. i had so much fun watching this video. :)
Civil Engineering Philosophy
 Dr. Patrick, thanks alot :) .it seems that you are using a formula that I feel I am familiar with. Please try it ( a*a = ((a+a)-100)*100 + (a-100)(a-100)) ... it is of same concept
Sejdr
Love these kinds of tricks...what wre ought to learn in school. :)
Joseph Lowe
this dude is beast he really knows what he is dong
Merryl Butcher
At which stage do numbers stop being "close" to 100? Or is it a case that numbers further away would work, but become laborious to do so? Neat number trick - I will show this to my students. 
Max Jiang
:D
A. C
This guy is a boss! Amazing Tricks!
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