Parents and Teachers: Please note we are making some internal changes to the site. As a result, the Great American Multiplication Challenge, Spellerz!, Burnside's Billions and couple of other games will not show statistics or return save codes for the next few days. They will be playable, but no data will be saved. They should be fully functional again by the end of the week. As always, please support this site by following me on FACEBOOK or TWITTER.

Negative and Positive Speed Math

 

This Game Works on All Devices

 

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