[math4] Activity: adding/subtracting whole numbers

[John Posner]

Edward Cherlin wrote:
> On Wed, Aug 26, 2009 at 1:37 PM, John Posner<jjposner at optimum.net> wrote:
>   
>> Hi --
>>
>> I've just Sugarized my "BlockHead" application, which enables kids to
>> add/subtract multiple-digit numbers by dragging Cuisenaire-like blocks.
>>     
>
> +1
>
> I've been wishing for that. Do you know how to do multiplication,
> division, fractions, and concepts of algebra such as commutativity in
> Cuisenaire rods?
>
>   

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.

-John