## The Way You Learned Math Is So Old School

NPR,
Mar 15, 2011

This is interesting. I learned to do math the 'old' way - that is, by multiplying the top number by each digit of the bottom number, shifting, and adding the products. The 'new way' apparently involves multiplying each digit by each digit. I don't think it's easier. I don't do it either way any more. I multiply by the nearest whole number and subtract the difference (or add the difference). I guess the advantage of the new way is that all your multiplications are one digit by one digit. So if you

*must*work it out in your head, you can at least ballpark it. I don't know, though. If you do a lot of counting (eg., in retail, where you should be able to just look at a stack of boxes and know how many units you have) it really makes sense to be able to do it the old way. Via TechDirt.[

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