A bit of number fun to start your week off right:
And speaking of those “scary” numbers out in the forest… Monday is Pi Day!
Have some irrational fun with these posts:
[Hat tip: Julie mentioned this video on the Living Math Forum.]
Having Fun with Math
Here’s another math blog for your RSS reader: Math 4 Love. Kitten laughed out loud at their One-Minute Math Video.
The Problem with Manipulatives
You may have seen this video making the edu-blog rounds:
Be My (Math) Valentine
Just as I was looking for a creative Valentine’s craft for Kitten, this showed up in my inbox:
Xi at 360 provides step-by-step instructions, with photos:
And for more Valentine’s Day fun:
Babymath: Story Problem Challenge III
<a href="http://www.flickr.com/photos/goetter/2352128932/"Photo by Raphael Goetter via Flickr
Alex and Leon enjoyed their baby sister, but they were amazed at how much work taking care of a baby could be. One particularly colicky night, everyone in the family took turns holding the baby, rocking the baby, patting her back, and walking her around before she finally succumbed to sleep.
Then Alex collapsed on the couch, and Leon sank into the recliner. They teased each other with these story problems.
Visual Proof of the Pythagorean Theorem
Beautifully done!
[From Girl’s Angle: A Math Club for Girls, via Albany Area Math Circle.]
Do you know why this proof works? How can we be sure the red and yellow areas don’t change as they slide around?
Advent Calendar of Math Games
Homeschoolers, you can have your math and enjoy it, too! Play a mathematics game every day until Christmas at nrich.maths.org:
How to Be a Math Genius
Egyptian Math: Fractions
I have been enjoying James Tanton’s website. In this video, Tanton explains a foolproof method for creating Egyptian fractions:
See more posts on Egyptian math.
A Harmonic Series Paradox
For my Calculus for Young People students: Beware! We studied a few infinite series that converge to a nice, tame sum — but not all series are so well behaved.
Check out this mind-blowing video from the author of Math Without Words:
[See also: Harmonic Series Quotation and For Niner: A Bit of Calculus Fun.]
Denise Gaskins' Let's Play Math 