It can be suggested that 1 big stone is 5, and 1 small stone is 1. If the result number is 9, how many big stones and small stones are needed? According to the relevant information of the query, the number of known results is 9 1, with large stones representing 5 and small stones representing 1. You can choose four small stones and one big stone as a match. 1 The big stone stands for 5, four small stones are 4, and 5 plus 4 equals 9. Solving problems in the first volume of junior high school mathematics is the key question type in the junior high school mathematics exam, and it also lays the foundation for studying applied problems in the future.