Fun Multiplication Tips and Tricks – 6’s

January 28, 2010

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photo by pshutterbug

I don’t know about you, but when I memorized addition and multiplication facts as a kid, it seemed that the 6’s, 7’s, and 8’s always seemed the hardest to remember.

Well, here’s a fun trick to help remember the 6’s:

  • When multiplying 6 by an EVEN number (sorry, it doesn’t work on the odds), the answer ends in the same final digit.
  • Some examples:  6 x 2 = 12, 6 x 6 = 36, 6 x 8 = 48, 6 x 12 = 72 and yes, even 6 x 472 = 2,832 if you really wanted to know.  🙂

Hope that helps a few of you out there.  Do you have any math tricks that helped you memorize the facts?

P.S.  Here are some previous tips and math reviews:

Enjoy!

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Posted under Math Curriculum

3 Comments »

2 Comments so far

  1. docmisty February 7, 2010 9:05 am

    Thanks for the great explanation Henry – I hadn’t thought it all the way through.

  2. Henry February 7, 2010 3:08 am

    The reason this works is because 6 times any name is the same as 5 time the number plus 1 times the number:

    6 * x = (5 * x) + (1 * x)

    5 times an even number will always end in zero, so the ones diget will always be x. (for single digit multiplication.)

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