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In Match-Up Math, children must match tiles with equal values in order to make them disappear. For example, 2+2 can be matched with a tile that says 4 or one that says 3+1.
When all the tiles are cleared, the player moves on to the next level. The difficulty increases as the player progresses and the backgrounds of the boards change, which gives the player a nice sense of progression. Someone in iTunes described it as "Mahjong Math." (I've never played Mahjong.)