【實用教育app】Mental Math 3 - Add/Subtract|最夯免費app-綠色工廠好玩App

Practice your mental Addition. Learn, practice and master new techniques to easily add and subtract 1-digit, 2-digit and 3-digit numbers. Learn and master complements and their use to make difficult addition(or subtraction) problems easy subtraction(or addition) problems. Finally learn how to calculate change easily in your head using complements. NO paper, pencil or calculator required. It all starts with mastering mental addition! That's it! Practice and master multiplying at the beginner level ALL IN YOUR HEAD. Master these skills mentally through PRACTICE! You'll be given random timed problem sets. Problems set are in three levels, Beginner, Intermediate and Advanced. As you progress from one level to the next, problems become more challenging, but your mastery (mentally) increases. A progress chart is maintained to you can track and monitor progress. Not only will you be able to mentally perform these operations, your familiarity with basic numbers will increase immensely. Great for younger children that are "bored" with the math at school. A real challenge! Give it a try today!