在教学中要紧紧围绕教材中的数感素材,通过估数活动训练数感、估算应用形成数感、数的运算促进数感、实践操作强化数感、具体情境把握数感。培养学生用数字表达、交流、解释和应用的能力,才能有效地促进学生数感的发展和数学素养的提高。 In teaching, we should closely focus on the number of materials in the textbooks, train the sense of number through the evaluation of activities, estimate the number of applications to form the sense of number, the number of operations to promote the sense of number, practice the operation to enhance the sense of number, and grasp the sense of number in the specific situation. In order to cultivate students ’abilities to express, communicate, explain and apply in digital form, we can effectively promote the development of students’ sense of numbers and the improvement of mathematical literacy.