Adding/Subtracting - Help your child develop essential early math concepts Product Information Give your children the skills they need! Working at their own pace, children will develop problem-solving skills, understand math symbols, and learn how to use numbers up to 100. They'll get plenty of number practice with these absorbing games and challenging activities, and a system of rewards and positive reinforcement helps your child gain confidence in early math skills! Learn and practice the fundamental concepts of adding and subtracting Develop problem-solving skills Intelligent software adjusts every game to the child's ability to respond to their individual strengths and weaknesses Includes printable worksheets and built-in progress tracking Math Machine A game that gently introduces numbers and symbols in a fun way. Supergame The exciting bonus Supergame is reached when all four games have been completed. It encourages speedy mental arithmetic. Sum It Up! Get a ""hands-on"" feel for addition with real objects.Count It Down! Click to remove moving objects for an exciting introduction to subtraction. Solve It! Solve arithmetic problems as well as hidden puzzles. 486DX/33MHz or higher Windows 95/98/Me/XP 16MB RAM 640 x 480 pixel 256 color screen display 8-bit sound card 10MB of available hard drive space Double-speed CD-ROM drive Loudspeaker or headphones Mouse 68LC040 25MHz System 7.01 to 9.1 Minimum of 8MB RAM 10MB available on hard drive 8-bit audio 640 x 480 pixel 256 colors Double-speed CD-ROM drive 16-bit sound card Loudspeaker or headphones Mouse