| If the mathematical method is the way to solve the problem,then the mathematical thought is the core of the problem.In primary school mathematics learning,multiple ratio problem is the key and difficult point of learning.Solving the problem of multiple ratio is helpful for students to develop their thinking and improve their intellectual education.Presents some notable problems in teaching practice,many teachers in teaching times than the problem just attaches great importance to the logical explanation and operation,enforcement of mathematical thought is only become a mere formality,for a long time,it leads to a serious shortage of students’ ability of problem solving,affect the students’ interest in learning mathematics,let the students lost confidence.This thesis is to study the application of the combination of number and form in the teaching of multiple ratio problems,mainly using literature method,classroom observation method,investigation method,interview method and other methods.Considering the difference of educational resources between urban and rural areas,two rural primary schools in L city and three primary schools in county town are randomly selected as the investigation scope.Through questionnaire survey and interview,the current situation of applying the combination of number and form in the teaching of multiple ratio problem is investigated.Through data analysis,it is found that there are some problems in the application of the combination of number and form in the teaching of multiple ratio problem,which are mainly reflected in teachers and students.This paper analyzes the reasons for the problems in the application of the combination of number and form in the teaching of multiple ratio problems.Through the analysis of the problems,it is found that the reasons for the problems in the application of the combination of number and form in the teaching of multiple ratio problems are mainly manifested in four aspects: teachers lack of professional guidance and training;Lack of teachers’ own theories;The influence of teachers’ teaching experience;The influence of students’ math learning habits.Combined with the teaching experience of excellent mathematics teachers and relevant research results,the following improvement strategies are proposed to solve the existing problems in the application of the combination of number and form in the teaching of multiple ratio problems: improve teachers’ understanding of the combination of number and form problems and the application of the combination of number and form ideas;Developing teaching practice to improve teachers’ teaching ability;Cultivate students’ good study habits;Rational use of information technology,enrich teaching resources.It provides a basis for teachers to apply the combination of number and form in the teaching of multiple ratio problems,enlighten students’ thinking and promote the development of problem solving ability. |