Decorative items: Abacus is also a desktop decoration, which means good luck and prosperity. Abacus tool: In addition to being a professional tool, it is also an educational tool. Widely used to teach counting and mathematics. Composition of the abacus: 2 beads on the top and 5 beads on the bottom. Long-term use: The beads make the numbers concrete and visible. It is a very useful and practical tool in general mathematics. Using an abacus as a math teaching tool can make math practice more effective, is a good way to teach calculation, and makes learning much easier.