Square Root Trick

Do it in your head!

This math trick allows you to estimate the square root of any number – NOT JUST PERFECT SQUARES – almost instantly with decimals.  Can you work faster than a calculator? With this trick you just might!

And for a bonus we’ll show you a trick for doing the squares of number.

Watch the video to learn the trick.

Journal Questions
  1. Did you understand the technique described in the video?
  2. What is the difference between an exact answer and an approximation?
  3. Are you going to use this technique on your next math test?

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And we promised a bonus – here’s a method for squaring any number under 1000 in your head:

 

Topics

Grade Level
6-8
9-12

Creator

tecmath
Making math easier!

Curator

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STEAMfest

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