[math4] Activity: adding/subtracting whole numbers

[David Farning]

On Fri, Aug 28, 2009 at 10:13 AM, John Posner<jjposner at optimum.net> wrote:
> 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,

Would you mind continuing the discussion on list.  This is exactly the
type of instance where one person builds on another persons idea to
make something great:)

In case you were worried this thread is head in a very usefully
direction.  The ideas that you and Ed come up with might be the basis
for someone's work next semester.

david
>
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