Re-free/small Ascending primary assisted mencal: Mental arithmetic skills learning test

I often see this or that kind of mental arithmetic on TV. In a section of looking at the formula quickly after writing a variety of answers, the beginning of a small set also thought that these people are gifted, can directly through the formula to see the results, then know that this is actually a long-term exercise results, like a Rubik's Cube, is a formula drop! The application introduced today is related to mental arithmetic exercise, concise interface must be made into WIN8 style, but fortunately the content is sufficient, users can add, subtract, multiply, divide, score, mix, etc. to understand the corresponding mental arithmetic skills, each skill has a corresponding question bank for users to practice consolidation, Users can set the answer time for each topic, and constantly do problems to upgrade the level, a lot of skills in the small series seems to be very magical Oh! Small part of the reason why write "small ascending first aid", although with the child deep sympathy, but because the reality is so. Perhaps because of mental arithmetic ability, the child can go to a good school, reverse the day. For adults, I guess 99.9% of the friends see will be surprised first, the calculation or the calculator ... Six months after the lapse of exemption, we can pay attention to!