The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » Curricula » Investigations Other Topics

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Clock tables with single number
Replies: 0  

Advanced Search

Back to Topic List Back to Topic List  
Marko Manninen

Posts: 1
Registered: 5/22/13
Clock tables with single number
Posted: May 22, 2013 7:31 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

I'd like to say Hi to forum members with this fun approach presenting numbers from 1 to 12 with one number only. It's a well known construction of 9 time table you can find from Internet. However, nine is nothing special in this case, but you can do same trick with other numbers. So I attached files for numbers from 1 to 9 plus sigma presentation of the clock.

Ideally you would use same number three times on each calculation. This is fulfilled on many cases, but there are exceptions, mostly because visual reasons. I have used basic math operational symbols here with no strict limit, what you can actually use. So task is a little bit ambiguous. Especially in case of using nearest integer, summation and addition notation.

Have a great summer!

Added other numbers on set and edited post body.

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.