“Because we do so much multi-step problem solving, and we’re doing two-step word problems, if they’re spending 10-15 minutes trying to figure out what 9x7 is, they’re doing a lot of extra work, or ...

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Doing math is thought to be a uniquely human skill. We can learn the abstract concept of a number: two things or three things or four things; we can represent that concept symbolically (2, 3, 4); and ...