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Why borrowing works

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Uploaded by on Mar 3, 2007

An explanation of why (not how) borrowing/regrouping works when subtracting numbers

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LICENSE: Creative Commons (Attribution-Noncommercial-No Derivative Works).

For more information about this license, please read: http://creativecommons.org/licenses/by-nc-nd/3.0/.

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  • wow, I'm an engineer and that didn't even cross my mind, lol. Thank you.

  • that's the spirit man, keep up fighting, it ofcourse saddens me you were injured, but it's really nice to see someone trying to learn math, as opposed to the attitude i often see at school. "i dont get, this this sucks, why do i have to learn this?"

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  • I am taking algebra 2 honors, but there is something that just fascinates me about some of your videos on simple math. It gives me a way of thinking I never knew about! Thank you!

  • would there be a particular field in math that borrowing belongs to?

  • Oh. I spent this entire video thinking; 'What has this got to do with the economical practicality of lending?'

    I've never heard this referred to as borrowing. It's just the natural way to add and subtract large number

  • 3:37. Top left corner is flying spaghetti monster, Ramen!!!!

  • Thank you!!! My son missed a week due to pneumonia/asthma and I was having a hard time getting this across to him. This really helped him understand how and why!

  • some of the things you teach in your videos are sometimes alittle more than what im learning in class (8th grade) but you always get right to the point in the end. these videos are GREAT. and they help people A LOT. thank you!

  • Wow this is grate

  • @HelpWithMath1 I believe it is credited to William Brownell. However, this is not the most efficient algorithm for subtraction. Many different subtraction algorithms are taught in various countries around the world.

  • wow fascinating

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