[math4] Activity: adding/subtracting whole numbers

[Greg DeKoenigsberg]

On Fri, 28 Aug 2009, John Posner wrote:

> Thanks for the support, Edward. I'm tempted to answer "yes", but then 
> I'm not sure exactly what you're getting at. I'd be very happy to 
> continue this discussion off-list. Feel free to contact me at 
> jjposner at optimum.net.

Just be sure to bring the results back on-list pls.  :)

--g

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