Because primary school students are young, have narrow life knowledge, little perceptual knowledge and weak abstract thinking ability,

Mathematical knowledge is abstract to them, but they are easy to accept intuitive things. Taking advantage of this feature, the rational and appropriate use of multimedia in teaching can not only enhance intuition, but also effectively avoid students' weariness of learning, reduce their heavy learning burden, and keep students in a state of excitement, pleasure and knowledge. It plays an important role in optimizing primary school mathematics classroom teaching and improving teaching effect. For example, when teaching "ten plus several, ten minus several", the courseware is used to show the building blocks, so that students can easily understand the logic that 15+2 should be calculated as 5+2 before 7+ 10.

Another example is the teaching of "the area of a circle". In order to make students better understand and master the derivation process of the formula for calculating the area of a circle, I cut the circle into two equal parts *** 16 by vivid animation of the courseware, and then put the two parts together alternately through animation, so that an approximate rectangle can be made. Let the students intuitively realize the process of turning a circle into a rectangle, and then let the students cut it themselves. Finally, they realized that the approximate rectangular area was completely equal to the original circular area. Guide the students to observe how this circle is transformed into the nearest rectangle. Then, 32 and 64 clip-and-paste animations were displayed during the vivid activities. Then lead the students to think about the relationship between the length and width of this approximate rectangle and the circle. Thus, the area formula of the circle is derived. This course can easily break through the difficulties, greatly improve the teaching efficiency and cultivate students' spatial imagination. Therefore, the proper use of modern information technology can turn the abstract into concrete, stimulate the cooperation of students' senses, and solve the content that teachers can't explain clearly and students can't understand, thus highlighting key points, breaking through difficulties and improving the effectiveness of classroom teaching.