The requirements of the new curriculum standard of the sixth unit of mathematics in the second grade of primary school are as follows: the multiplication formula of 7 is guided by the physical diagram, and the results are obtained and presented in a list; The multiplication formula of 8 is arranged in a military band familiar to students, and the result of addition is obtained through guiding observation and presented in the form of several axes; The multiplication formula of 9 is based on the schematic diagram of dragon boat race. Through observation and reasoning, the result of addition is obtained and presented in the form of number axis.