Mental arithmetic by hand and brain-reduce the complicated calculation process of written calculation formula, save time and effort and improve the calculation speed of students. Niu Hongwei, a teacher in Xi 'an, has been engaged in education for many years, and applied hand-brain mental arithmetic to the field of early childhood education. He has taught thousands of children to learn "hand-brain mental arithmetic" It has a good effect in inspiring children's intelligence. Hand-brain mental arithmetic has effectively developed students' brains and stimulated their potential.