Archive for the ‘Mathcast’ Category
Monday, December 10th, 2007
Here's a video on how to quickly square a 2-digit number. The technique is based on this algebra:
If you have a number with digits "ab" then the number is 10a+b.
(10a+b)^2 = 100a^2+20ab+b^2.
If you enjoy this video check out all of the Wild About Math! mathcasts.
[youtube]http://www.youtube.com/watch?v=_wjxgz6r-_U[/youtube]
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title: "Mathcast #4: Quick squaring ...
Posted in Mathcast, Fast Arithmetic, Algebra | 9 Comments »
Saturday, December 1st, 2007
I've produced a second mathcast, this one using Camtasia screen recorder. I've posted the mathcast on You Tube and you can watch it right here without leaving the blog. This video shows you how to quickly multiply together a pair of two digit numbers without having to write down the ...
Posted in Mathcast, Fast Arithmetic | 17 Comments »
Thursday, November 29th, 2007
Ever since starting this blog a couple of months ago I have felt that text and graphics could only go so far in helping people to get wild about Math. I knew that video was the next step in helping to explain mathematical ideas and in getting more people engaged ...
Posted in Mathcast, Fast Arithmetic | 11 Comments »
