计算在数学中占有很大的比例,数学知识的学习几乎都离不开计算。因此,计算教学是小学教学的重要部分。《数学课程标准》在“内容标准”中提出:“应重视口算,加强估算,提倡(鼓励)算法多样化”。在“教学建议”中第一学段指出:“由于学生生活背景和思考角度不同,所使用的方法必然是多种多样的,教师应尊重学生的想法,鼓励学生独立思考,提倡计算方法的多样化”。过去计算教学中往往只有一种算法,“算法多样化”是针对这一弊端而提出来的,意味着 Calculation occupies a large proportion of mathematics, almost all of mathematics knowledge can not be calculated. Therefore, the calculation of teaching is an important part of primary school teaching. “Mathematics curriculum standards” in “content standard ” put forward: “should pay attention to port count, strengthen estimation, advocate (encourage) algorithm diversification ”. The first paragraph of “Teaching Suggestions” states: “Due to the different student life backgrounds and thinking angles, the methods used must be varied. Teachers should respect the students' ideas, encourage students to think independently and advocate the calculation Diversification of methods. ” In the past, there was often only one algorithm in computational teaching, and “algorithm diversification” was put forward in response to this drawback, which means