Solving the traditional mathematical problem with list method: the problem of chickens and rabbits in the same cage. Make three tables: the first table is an example method one by one. According to the situation of 20 chickens and rabbits, assuming that there is only 1 chicken, there are 19 rabbits and 78 legs ..... so list them one by one until you find the desired answer; In the second table, after several enumerations, the rule of counting only and the number of legs is found, thus reducing the enumeration times; The third table is listed from the middle. Because there are 20 chickens and rabbits, each chicken is taken as 10, and then the marketing direction is determined according to the actual data.