A basic question is how many numbers can be found in a graph, and then a corresponding number can be written. This is the most basic topic, and then some topics about the combination of numbers and shapes, as well as some topics about addition, subtraction, multiplication and division, all get a number or a formula by looking at graphs, so this is even a topic about the combination of numbers and shapes.
And the combination of numbers and shapes in primary schools is relatively simple. It will become complicated in junior high school or senior high school, so the above is the application of the idea of combining numbers and shapes in primary school mathematics.