The game “Mental Math. Addition and subtraction” is developed to train mental addition and subtraction skills.
In the initial levels of the game you should solve problems in addition and subtraction within 10, then – within 20 and 100. In new version of the game levels are added, with examples of up to 1000! With each level the problems become more complex and progress in the game depends on how fast and error free you can add and subtract!
Requires Adobe Air to run, version 2.5.
Keywords: addition, subtraction, calculation, school, math, arithmetic, lesson, game, teaching, algebra.
