Mental Calculation Maths games for kids and adults, calculus games to play online and free. Perform simple mathematical operations quickly and against the clock, training your mental agility. Discover educational games to learn and revise arithmetic, within the area of mathematics. Children will be able to play mental calculation activities, with the different mathematical operations and operators such as addition, subtraction, multiplication and division. Calculations and operations with numbers in these arithmetic games to improve and enjoy maths.