Every year The Math Forum hosts the Mathematics Game, in which students use the 4 digits of the
current year plus various operations (which change from year to year, depending) to make expressions
that equal the counting numbers from 1 to 100.
To see the rules for the 2010 game, visit http://mathforum.org/yeargame/2010/
I have attached the results sheet that I will use with my students this year.
Cheers
Rex