Mathematics teaching in primary schools requires mastering the knowledge of numbers. Understanding numbers mainly refers to understanding the meaning of numbers within 10,000 in real situations, being able to recognize and read and write numbers within 10,000, and being able to express the number of objects or the order and position of things with numbers. Be able to say the name of each number and understand the meaning of the number on each number; Know that an abacus can represent multiple numbers. Understanding symbol

digital arithmetic

The operation of numbers should be combined with specific situations to understand the significance of the four operations of integers. Proficient in oral calculation of addition and subtraction within 20, multiplication and division within tables, addition and subtraction within 100 and multiplication and division of one and two digits. Can calculate the addition and subtraction of three digits, one digit multiplied by three digits, two digits multiplied by two digits, three digits divided by one digit. Knowing the brackets, you can do simple integer elementary arithmetic (two steps).

It is required to add and subtract fractions with the same denominator (the denominator is less than 10) and add and subtract one decimal place. Be able to estimate according to the specific situation and explain the estimation process. Communicate their algorithms with others. Can use numbers and numbers to solve simple problems in life, and explain the practical significance of the results.