Formula 999 of China traditional culture (China Formula 999 for short) is a national patent, named after the national brand name, which was included in the "Twelfth Five-Year" development plan of education science, and participated in the 20 10 Shanghai World Expo on behalf of the education sector in China. It is the only educational innovation in China's education system that has entered the Shanghai World Expo! A new path appears in the operation, and the calculation enters a new stage. 999 formula is the basic tool of operation, and a new operation path is added on the basis of the original method, which makes the calculation of four operations (addition, subtraction, multiplication and division) enter a new stage. If you want to get on the highway quickly, you are not afraid to take the old road slowly! What is the 999 formula? (1) China formula 999 was appraised by 7 expert groups and more than 30 authoritative experts. 20 10, as the only representative of China's education sector, participated in the Shanghai World Expo, showing its magic to the world and improving China's international position in the field of mathematics. ? ? (2) China Formula 999 has passed the expert review and has been included in the 12th Five-Year Development Plan of Education Science. ? ? (3) Inscription by Vice President of Heilongjiang Academy of Educational Sciences "It is a great contribution to mankind". ? ? (4) The formula of China 999 was granted the national patent. The number, form and logic of sentences are the same as multiplication; Function, function and effect are the same as multiplication. ? ? Now Beijing International Aviation Education has rectified a set of children's textbook "Ninety-nine Mathematics", which is of great help to children's education. I hope this helps.