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I’m almost finished putting up the first week of the new “Quick and Dirty Multiplication” Math Mojo course. In the meantime, a few people have asked me to get to work on a “Quick and Dirty Addition” Math Mojo course. I won’t be able to get to that for a few weeks, but if you [...] By the end of this course, anybody who puts a bit of effort into it will be able to freak out any teacher, job-interviewer, college entrance examiner, or basically anyone with their calculating abilities. [...] “In mathematics the art of proposing a question must be held of higher value than solving it.” Georg Cantor About a month ago, Penny commented on this post. Here is an except from that comment: “Frankly, I don’t care if an elementary school child can add long columns of numbers in their head [...]
original photo from Richard Masoner Edited by Brian Not sure what got me thinking about this today, but I was musing about the commutative property, and how it applies to addition and multiplication. (Yeah, it was a pretty boring morning.) Specifically, I was thinking about the word, “augend”. The augend of an [...] Make your own Cardboard Abax Educators just love buzz words. One of the most frequently used buzzwords in math ed. is “manipulatives.” Of course, the greatest manipulatives there are, are your hands and fingers. (Ever wonder why they call them “digits?”) In the last post, I talked about basic addition. The links lead [...] After having spent some time trying to find the best way to deliver some MathMojo, I have arrived, so far, at podcasting. But not that old “audio-only” stuff. I’ve made an “enhanced podcast” about the very basics of addition, which you can access here. (whoops, that site is down. I’ll try to get this fixed soon. [...] …if you have, say, 1/4 of a apple blueberry crumble pie (you can tell where my mind is this balmy upstate Memorial day), and you have 1/5 of another apple blueberry crumble pie, how much apple blueberry crumble pie do you have altogether? [...] Which is greater, x2*y2 or x2+y2? I am thinking about an example from a GRE (graduate record exam) book that was shown to me. I think it was "Which is greater, x2+y2 or (x+y)2? Here is the poop on how to think about examples like that. When in doubt – substitute (if you can) for [...] |
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