1. Grouping count: group the same or similar figures into one group, then count the number of each group, and finally add the numbers of each group to get the total. This method can greatly simplify the counting process and reduce errors. For example, when counting a pile of steel pipes, you can group the steel pipes with the same size and shape, then count the number of steel pipes in each group, and finally add up the number of each group to get the total.
2. Crossing method: For some plane figures, such as triangles, it can be divided into two parts, and then the number of each part is calculated separately, and finally the two numbers are added to get the total. This method is called crossover method. When calculating a quadrilateral, you can divide it into two triangles, then calculate the number of each triangle separately, and finally add the two numbers to get the total number of quadrilaterals.
3. Balance method: divide the graph into several equal parts, then count the number of graphs in each part, and finally add up the number of each part to get the total. This method is called equilibrium method. For example, when counting a hexagon, you can divide it into six triangles, then calculate the number of each triangle separately, and finally add these six numbers to get the total number of hexagons.
Related content of digital graphics
1, the number graph is a very basic and important content in mathematics, which involves the knowledge of graph counting, area, perimeter and so on. By counting graphs, we can better understand the essence and characteristics of graphs, master the basic concepts and calculation methods of graphs, and improve the mathematical thinking ability and problem-solving ability.
2. Digital graphics can help us better understand the nature and characteristics of graphics. In mathematics, different figures have different properties and characteristics, such as the stability of triangles, the equality of diagonal lines of rectangles, the equality of four sides of squares and so on. By counting graphs, we can better understand and master these properties and characteristics and deepen our understanding of the basic concepts of graphs.
3. Digital graphics can help us master the basic calculation method of graphics. In mathematics, there are many ways to calculate figures, such as the area of a rectangle, the perimeter of a triangle, the area of a circle and so on. By calculating numbers, we can master these calculation methods and skillfully apply them to practical mathematical problems.
4. Mathematical graphics can also improve our mathematical thinking ability and problem-solving ability. In the process of calculating numbers, we need to constantly observe, analyze, reason and judge, which are all important manifestations of mathematical thinking. By calculating numbers, we can improve our ability of observation, analysis, reasoning and judgment, thus solving various mathematical problems better.