The meaning of decimals, first of all, teachers can take the concept of "let students experience the construction of mathematical knowledge" as the commander in chief. All the courseware in the class is simple and clear, and is designed to solve problems. The design of each link cherishes the child's personalized experience and causes the child to think deeply. Teachers have successfully played the guiding role of students in learning knowledge.

Throughout this lesson, there are many wonderful places worth learning.

First of all, the connection between new knowledge and old knowledge is ingenious.

Let the students show a rope first, and let them measure it on the stage to get the data of 2m 10cm. It is required to change the data of 2m 10cm to "meter" to get the representation of 2. 1m, then show the meter ruler in the courseware and let the students guess, find and represent 0.65438.

Second, pay attention to the infiltration of thinking methods.

Mathematical thinking method is the soul of mathematical knowledge structure. In teaching, we should not only pay attention to students' knowledge acquisition and ability training, but also pay attention to the infiltration of mathematical thinking methods. In this course, mathematical ideas such as correspondence and inclusion permeate the teaching. In the whole process, the teacher went from helping to letting go, the trace of traction gradually faded away, and more students were strongly exploring.

Third, it is suggested to combine support and release to cultivate ability.

When dealing with one, two and three decimal places, the teacher's time control is not very scientific and reasonable, nor is it the average use of power. The focus is on the exploration of one decimal place. It is hoped that the follow-up teaching will enable students to make a smooth transition from intuitive thinking to abstract thinking and make abstract mathematical concepts easy to understand.