The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Math Innovations, LLC:
Math Explosion is a new and fun way to conquer word problems. You can compete against your friends or against yourself solving problems in five categories: decimals, fractions, integers, proportions and percentages. Each category has three levels: easy medium and hard. You can access clues to give you math strategies to help you solve the problems. The more problems you solve, the higher your score. You can even use the clues section to help you with your homework when you are not playing the game. Its finally time to Explode into Math!