Hi John -- I like that your 2nd example doesn't go strictly left to right *or* right to left -- columns resolve (by carrying) in various orders, always to the same end.
I could see boosting the frame rate at showing many more examples really quickly -- another meaning of "mental arithmetic". 2nd roots anyone? Kirby On Mon, Sep 15, 2008 at 4:19 PM, John Posner <[EMAIL PROTECTED]> wrote: >> ... Presumably we could apply the same approach to teaching >> elementary-school arithmetic algorithms, maze traversal algorithms, >> and the like for One Laptop Per Child. I have suggested this to their >> Education mailing list. > > Here's a video of a tool I wrote to help elementary-school kids learn > carrying/borrowing in the addition/subtraction of whole numbers. > > http://showmedo.com/videos/video?name=2010000&fromSeriesID=201 > > > To get this tool, and a similar one for adding/subtracting fractions, go to: > > http://www.geocities.com/jjphoogrp > > -John Posner > > > _______________________________________________ > Edu-sig mailing list > [email protected] > http://mail.python.org/mailman/listinfo/edu-sig > _______________________________________________ Edu-sig mailing list [email protected] http://mail.python.org/mailman/listinfo/edu-sig
