[math4] Activity: adding/subtracting whole numbers

[John Posner]

David Farning wrote:
> Why yes there is:)
>
> Now that you have some code, it is time to make it public.
> 1.  Upload the activity to http://activities.sugarlabs.org .  This is
> the activities library students and teachers use to grab new
> activities.
>   
Thanks, David. I'm stuck trying to following the directions on page 
http://activities.sugarlabs.org/en-US/developers/addon/submit. I tried 
to upload my small .xo file (it's attached to this message), but the 
page hangs while displaying the message "Uploading file ..."

-John

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