Partial Quotient Method Of Division | Multiplication And Division | Arithmetic | Khan Academy


An alternate to traditional long division

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34 thoughts

  1. @keyloggerable1
    But the second one can easily be in the head, while the first one is quite hard without paper. It took me around 15 seconds to divide this with the second method without pen and paper.
    So “fuzzy” is quite useful! 😉

  2. @vpletap
    You’re right, could be confusing. It should at least not be taught at the same time. The methods that follow strict rules first, and sometime later the “mental exercises”. It’s just that there are many tricks for addition/multiplication/division that help you get a feeling for numbers. E. g. it’s a real timesaver, if you can get estimates very close and fast in your head. Actually maybe those fuzzy methods should be taught/used in other classes and NOT the math class.

  3. the kids find this to be a waste of their time. they only want one method. makes sense to me unless u simply love playing with numbers. i can do this in my head without all this verbal carry on.

  4. i used this today because i heard the line “you ask me where the hell i’m going
    at a thousand feet per second” in a radiohead song and i wanted to know what that was in miles per hour. 🙂 this method saved me from having to work out the products of 5280 x 2 through 9 beforehand. very useful method for when you have a big divisor. i can’t believe anyone would complain about having more tools at their disposal, but i guess it is youtube…

  5. 1376 is simply factorised to 43×32, so 1388=12 + 43x16x2, with divisor 16, modular 86 and remainder 12.

  6. I don’t have kids in school, and am trying to find a video that teaches “Common Core division” that is being taught in school right now.  Is that the 2nd example, or is it another process?  If it is, do you know of a video that explains it? Thank you!!

  7. Thanks a lot. Now I can explain this to my son. I actually do math like this in my head, but I didn’t realize it was a “method.”

  8. Wow I’ve Ben getting F,s in math on my second report card but when I watched this 5 times I got a D thx so much 😀

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