Title: Fun Math Trick! Squaring Numbers Near 100
Resource: Video
Link: http://www.youtube.com/watch?v=JKWpI2EuIDA
Reasons for recommendation: This video definitely speeds things up for squaring numbers near 100, especially when we don't have a calculator. This can be useful in times of Maths Olympiads where calculators are not allowed. Even though it may seem difficult, it is actually very easy with this method. Hence, more people should know about this.
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