Star Math Plus is a math game of quick calculation. With this game you or your children can improve their mathematical skills, test mental math and improve patience level. Available on the App Store at the address: https://itunes.apple.com/vn/app/star-math-+/id1044194413 *** FEATURES: *** - Only supports two arithmetic operations: addition, substraction. - The value of an expression (a formula) is always less than 9. - Three play levels ( L4A, L5A, L6A). - Six numbers in a formula. (above 50 scores) - Share and compare scores with other players. - Ranking of the best players. - Achievements to get. HOW TO PLAY: - Make mental calculation as quickly (quicks) as possible. - Tap to rotate the shapes (square, pentagon, hexagon) clockwise and catch the ball of question mark with the matching side of answer. - Reach high scores.