Research On Elementary Fraction Teaching Design Of Development In Number Sense

As one of the core concepts in elementary school mathematics,the expansion of fraction is an important part of elementary mathematics knowledge.The fraction are unique because of their uniqueness.The number sense of the fraction is a kind of perc-eption of the fraction,and it is sensitive to the realistic meaning of the fraction,so as to connect the fraction with the real life.Through literature review and according to requirements of the curriculum,this study summarized the characteristics of fractional number sense: fraction number sense is hidden inside,it is not as intuitive and specific as integer number sense,and the con-nection to real life is weak;fraction number sense is transformational.In the understa-nding of the number representation,fraction plays a unique role,it contains the concepts of equivalence classes and transformations.fraction number sense is diverse,and the multiple meanings of fraction and special calculation methods all break the regular pattern of integers,suggesting that the infinite possibilities of fraction,so fraction are more diverse.At the same time,this study investigated the current situation of the development of the number sense of elementary fraction teaching,and concluded that students perform poorly,boys perform better than girls.It needs to be strengthened in judge the unit "1" and dimensional.Students can use equivalent classes of fractions,but don’t know what it means,the fraction as the number of consciousness is weak,it is difficult to use a special reference point in the graph and line model,Students remain suspicious of their fraction number sense.According to the characteristics of fractional number sense and the analysis of the current situation,this study puts forward the practical,communicative and intuitional principles of elementary fraction teaching design,and give the following strategies:combination of dimensions and dimen.-sionless,close contact of life;accurately judge the unit "1" and clarify the quantity relation;build a number line model,several form combiningand.check the results again and again,strengthen the consciousness of checking calculation.using the special test points of fraction to simplify the operation.Finally,based on the above conclusions,the teaching case design and research reflection are carried out.