Simple Math

Find x to get the correct operation. New concept, new experience. Have fun and good luck! *** License of resouces in app *** App using resoure from iconfinder.com and freesound.org. You can find licenses at "http://creativecommons.org/licenses/by/3.0/" "http://opensource.org/licenses/MIT", "http://freesound.org/help/tos_web/" and "http://support.iconfinder.com/customer/portal/topics/417141-licenses/articles".