Trick two digit speed multiplication

Loading...

Sign in or sign up now!
Alert icon
Upgrade to the latest Flash Player for improved playback performance. Upgrade now or more info.
13,710
Loading...
Alert icon
Sign in or sign up now!
Alert icon

Uploaded by on Oct 1, 2007

math

Category:

Howto & Style

Tags:

License:

Standard YouTube License

  • likes, 2 dislikes

Link to this comment:

Share to:
see all

All Comments (9)

Sign In or Sign Up now to post a comment!
  • WOW!!! Now I can do my multiplication test REALLY easily! Thanks!

    Not. :)

  • Video is broken - it's only 18 seconds long

  • My friend show me this video..

  • You must have adapted the idea from FOIL. Its still pretty cool though

  • would be easier if u deal with the ones place first...on the last one... 97x89=.... 7x9=63 write down the 3 and then carry 6, then 9x9+7x8=137+6=143 then write down the 3 and carry 14 and now u have 33... the last step is 8x9=72, then just add 14 to 72 and ur answer is 8633....get the idea?

    or u could do 97+3=100, 89+11=100 so you can do either 97-11=86 or 89-3=86... and then just multiply 3 by 11 which is 33... ur answer is 8633.... same!!

  • How did you come up with this?

    From a book, or own imagination?

    -Mesqueeb

  • Why watch it then?

  • nice

  • thank you man

Loading...

Alert icon
0 / 00Unsaved Playlist Return to active list
    1. Your queue is empty. Add videos to your queue using this button:
      or sign in to load a different list.
    Loading...Loading...Saving...
    • Clear all videos from this list
    • Learn more