1. Progressive oral arithmetic is a kind of oral arithmetic training method with increasing difficulty. By gradually increasing the complexity and difficulty of calculation, students can gradually improve the speed and accuracy of oral calculation. Computational expert is a kind of mathematics teaching method that pays attention to thinking training and problem-solving ability. By providing a series of interesting mathematical problems and challenges, students' thinking and reasoning ability are stimulated and their mathematical thinking and problem-solving ability are cultivated.

Step-by-step oral arithmetic pays attention to repeated practice and memory, which is helpful to cultivate students' computing ability and basic mathematics skills. Experts in computing pay attention to cultivating students' logical thinking and creative thinking ability.