Some people calculate with ease, for others computing is more like a torture. However, practice makes perfect, and if one wants to improve his calculating skills, all he needs is just more experience. It's hard to do new exercises every time one wants to tease his brain. Because speed does matter in calculating, it's better if one computes as fast as he can. Developers of Sum-it-up took all those factors into account and produced unique exciting brain-teaser that matches most important and efficient features of math practice such as speed, diversity and interest in calculating. Sum-it-up represents a game where you may improve your math skills calculating numbers in particular order. A player needs to link numbers to sum them up in a way that makes their sum equal to the number from the special tiles. As it does, grouped numbers are disappeared and the new ones come to the board field. Thus, field conditions change permanently. However, even if you think too much before your next action, time could be up or flame-and-fire numbers burn the figures which are below and next to them. As red numbers go below the lower boundary, the game ends. In order to make the game more exciting, there are a lot of special tiles that have effect on calculation and board field. Multiplying, freezing, gravity, double-numbers tiles are not the full list of ones that a player meets playing Sum-it-up. However, there is no way to lose in this game, because even if a game ends, a player has already got his benefits - better and faster calculating. So don't give up Sum-it-up and compute your best!