How to arrange the expansion homework of the first volume of mathematics homework in grade four? The expansion operation is an extension of the basic operation, which is relatively simple, and the expansion operation can appropriately increase the difficulty. The basic work is relatively simple, and the expansion work can be more flexible. Basic homework is closely combined with textbooks, and expanding homework can pay more attention to practice and be more closely linked with life. At present, project-based learning is more comprehensive, and expansion assignments can be arranged as project-based assignments.