MrNussbaum VS MrN365

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Great American Subtraction Challenge - Online

Help your state rise to the top of the leaderboards in the Great American Subtraction Challenge. First choose your state (this may happen automatically or you may have to allow the program to obtain your location). Then, choose the subtraction tables to practice. Answer as many subtraction facts as you can in two minutes. When you are finished, click on “view statistics” and see how your performance helps your state.