The number of combined graphics has been involved from the second grade of primary school to the fourth and fifth grades of primary school.

Many primary school students encounter the problem of the number of combined numbers, and they don't know where to start. In fact, many questions about the number of combined numbers have certain rules. To complete such questions, we must follow such rules.

For example, when we count the number of squares, we often divide them into small unit structures with a field shape or a sun shape as a whole. There are five squares in a field, or three squares in a day. Then the number of these small cell structures can be counted in a certain order, and the number of squares can be counted soon.

For example, when we encounter the number of triangles, we often turn it into the problem of calculating the number of lines. If we encounter complex irregular figures, we can also divide the irregular figures into familiar regular figures and count them part by part.

In short, such problems are ever-changing, but there are several ways. As long as effective methods are taught to children, this can be solved.