8/31/26 - Teachers and Parents - You can now purchase a "forever" pass to MrNussbaum.com for $89. Your one-time purchase entitles you and your students to unlimited use of the entire site. It will never recur or renew. An annual subscription can always be purchased for $49 or a monthly subscription for $9.99.

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Are you up to this addition and subtraction challenge? Welcome to the first annual all-pretzel arm wrestling tournament. Although you can’t hope to match the pure strength of the world’s best arm wrestling pretzels, you have one advantage – the strength of your pretzel-flexible arms is governed by your quick skills in addition and subtraction. Subdue your worthy opponents with your error-free calculations. Be careful though – errors you can afford to make in the first few rounds will lead to your demise in the last few rounds. Be quick —- and accurate. The calculations get harder as you move on, but you’ll have to make less of them in the later rounds.

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