Maths Loop Cards (Follow Me, I Have Who Has)
Example loop cards from the free tool here:
http://www.senteacher.org/worksheet/86/FollowMeCards.html
The tool creates games for any number of players using a range of problems and difficulties.
Addition, multiplication, subtraction and division versions are included.
Other games that can be created include worded problems - halving, doubling, trebling and simply reading/converting complex numbers in written form