Young students around the world struggle to memorize multiplication tables, but the effort pays off. Cognitive scientists say that learning 6 x 7 and 8 x 9 by heart frees up the brain’s working memory ...

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Dr. Mel Levine: What's hard about math? Dmitri: Multiplication and division and just those kind of things, like really big numbers on a page. It just take-takes me days to figure it out. [cut to Dr.