Stage: 1 Challenge Level: 
We hope you've enjoyed playing this game. If you've
made up your own rules, we would really like to hear about
them.
Counting. Visualising. Interactivities. Mental addition & subtraction. Addition & subtraction. Length/distance. Dice. Time. Clock. Games.
Published May 2008.
Copyright © 2007. University of Cambridge. All rights reserved.
NRICH is part of the family of activities in the Millennium Mathematics Project, which also includes the Plus and Motivate sites.
email: nrich@damtp.cam.ac.uk