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To check multiplication of single digits by longer numbers with playing cards: We’re going to use what I call “numbers crunching” to check. That is the same as using the nines-remainders. You do know how to get the nines-remainder of a number, don’t you? It’s very simple, but it takes a bit of explaining. [...] Math Mojo has got some surprises for you. New lessons on how to improve your basic math skills, and videos! Professor Homunculus is getting his Video Mojo workin’ to bring you some great new stuff. The first set of videos will be about how to practice multiplication using playing cards. So grab a deck [...] |
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