Mental arithmetic and oral arithmetic are carried out at the same time. Oral arithmetic is to calculate with the brain and remember the results at that time with oral narration. This method is used for quick calculation, and regular practice is helpful to improve intelligence. It has also become the mainstream calculation method today. Also called "mental arithmetic". One of mathematics teaching methods. A calculation method based on thinking and language activities without any tools.
Oral arithmetic can train students to calculate quickly and develop their attention, memory and thinking ability. Proficiency in verbal calculation is helpful for written calculation and is convenient for daily use.