1. What is an abacus and how does it work? | ![]() |
2. How do you draw an abacus diagram? | ![]() |
3. What are the values of the beads on an abacus? | ![]() |
4. How can beginners learn to use an abacus effectively? | ![]() |
5. Are there different types of abacuses, and how do they differ? | ![]() |