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Sharpen your math skills and boost cognitive function with Kobadoo Arithmetic! This fun brain-training game challenges you to quickly and accurately perform addition and subtraction with numbers up to two digits. With 31 levels of increasing difficulty, exercise your working memory and improve your overall mental performance. Play now at Kobadoo.com! math, arithmetic, brain training, cognitive skills, memory, math game, number games, mental performance, working memory, problem solving, addition, subtraction, Kobadoo Arithmetic