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I had the same reaction: it's really remarkable how well those two methods map to my own mental arithmetic algorithms. The grid multiplication technique would
by blahedo 16y ago
I had the same reaction: it's really remarkable how well those two methods map to my own mental arithmetic algorithms. The grid multiplication technique would also prepare the student pretty well for polynomial multiplication (which is how I originally derived it).
- Natsu 16y agoSame here. I taught myself the same methods and several other similar things that I found uses for later, when I got my degree in mathematics.