Hakan: /* Tankegympa */

2015-01-07T22:36:11Z

Tankegympa

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	These mental computations can be done very quickly with just a little practice, so amaze your friends with how fast you can square two digit numbers!		These mental computations can be done very quickly with just a little practice, so amaze your friends with how fast you can square two digit numbers!

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Hakan: Skapade sidan med '== Tankegympa == Från Quora: Wu's Squaring Trick, named after the famous Scott Wu, is a technique used to quickly square numbers over 25 in your head. It uses the identity...'

2015-01-07T22:35:35Z

Skapade sidan med '== Tankegympa == Från Quora: Wu's Squaring Trick, named after the famous Scott Wu, is a technique used to quickly square numbers over 25 in your head. It uses the identity...'

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== Tankegympa ==

Från Quora:

Wu's Squaring Trick, named after the famous Scott Wu, is a technique used to quickly square numbers over 25 in your head. It uses the identity

: <math> n^2 = (n-25) \cdot 100 + (n-50)^2 </math>

For example,

: <math> 62^2 = 37 \cdot 100 + 12^2 = 3844 </math>
:
: <math> 44^2 = 19 \cdot 100 + 6^2 = 1936 </math>
:
: <math> 77^2 = 52 \cdot 100 + 27^2 = 5929 </math>

These mental computations can be done very quickly with just a little practice, so amaze your friends with how fast you can square two digit numbers!

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Hakan: /* Tankegympa */

Hakan: Skapade sidan med '== Tankegympa == Från Quora: Wu's Squaring Trick, named after the famous Scott Wu, is a technique used to quickly square numbers over 25 in your head. It uses the identity...'