The key of graphic measurement is to determine the size of the graphic. Students will experience the process of unifying measurement units and feel the significance of unifying measurement units. Based on the understanding of measurement unit, length, angle, perimeter, area and volume of graphics, the mathematical measurement method is realized in the process of deducing the calculation methods of perimeter, area and volume of some common graphics, and a sense of quantity and reasoning is gradually formed. Sense of quantity and reasoning are the core qualities that mathematics should pay attention to.

The understanding of graphics is mainly the abstraction of graphics. It embodies the very important characteristics of mathematics, gives you a real object from real life, and draws its graphics from it. Students will experience the process of abstracting geometric figures from real objects, know the characteristics of figures, understand the relationship between points, lines and surfaces, accumulate observation and thinking experience from one dimension to two dimensions and then to three dimensions, and form the concept of space.