I found a new resource for K-5 math games.
The entire website has wonderful resources for teachers http://www.youcubed.org/ , but if you want to jump straight to the games, you can look for this picture –
Some of the games will be familiar to you.
Here’s a game that’s new to me:
Get to Zero
• two or three players
• three dice
• paper and pencil
How to Play
First, on a sheet of paper, each player needs to write the players’ names and the number 999 under each name.
A player rolls the three dice, then arranges the three numbers (for example, 2, 3, 5) in
some order (for example, 235, 352, 532, and so on) and subtracts that 3-digit number
from 999. The other players also should subtract as a check.
The players take turns, rolling the die to make their special number and continuing to
subtract. The winner is the first player to reach 0, but they must get to 0 exactly. At any time, a player may choose to roll only one or two dice, instead of three dice. If the only numbers a player can make are larger that his remaining score, the player loses his turn.
You can adapt the game by changing the starting number and the number of dice used. For example, start with the number 99 and roll 2 dice.