Zero Sum is another math-based game that ends up being pretty fun. It's a standard Match-3 style game like Bejeweled. The difference is that instead of swapping two tiles, the first tile you click gets added to the second tile, and the empty space is replaced with the tile waiting at the front of a queue of tiles on the right side of the screen. The tiles only contain the ones place of a sum, so in this game 9+1 = 0, 5+6 = 1, etc. The "zero sum" mechanic comes in when you add up numbers to equal 10, because a 0 tile is a wild card that can match with any two other tiles.

There are two problems with this game that make it less than ideal for learning basic sums. One is that you can play the game by completely ignoring the sums, and just trying to create matches by watching the queue of tiles on the right. The other problem is the time limit actually encourages you to do this, rather than trying to come up with an ideal move using the combined strategy of summation and the tile queue. That aside, it wouldn't be the worst place to start if you're thinking about creating a fun game to encourage arithmetic table memorization.

Play Zero Sum