The integral standard of middle class children is within 10.

The goal of middle school children's mathematics learning is to let children know the numbers within 1~ 10, understand the meaning of numbers, and learn to use these numbers to represent the number of objects. This lays the foundation for children to learn more numbers in the future. Correctly judge the numbers within 10, and perceive and experience the number difference relationship between two adjacent numbers within 10. Let children have a certain feeling about mathematics. Objects can be classified according to different standards and two attributes (size, color, shape, etc.). Mathematics comes from life, so we often learn from life. Understand and compare the width of objects and classify them according to width and narrow; Guide children to classify items according to ABB rules, and find the rules to know what is in the next row and what they missed.