Abacus Soroban 17 Digits Rods Chinese Japanese Abacus Calculator Educational Tools Abacus Counting Tool for Adults

Abacus Size - 17 positions: 26.3 6 1.5cm (10.3 2.3 0.5 inches). Traditional abacus, a classic tool that can still be used normally. Use Range - A good tool for math education. Can be used as a classic office calculator, an educational tool for teachers or a gift for abacus collectors. Ideal Educational Tool - Abacus to make math exercises more effective; using an abacus to calculate childrens math ability is a good way to teach them how to count and calculate intelligence.