The oral calculation of the first grade is generally 5 minutes. Because it is relatively simple, I have mastered the most basic operating rules and can answer it soon. Some children who do mental arithmetic can do it in two minutes, because they practice more, faster and have better skills. Some children, who usually don't practice much, may be slower.

Summary of oral calculation questions

Mental arithmetic and verbal arithmetic. 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. It 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.