Black long Di fang Digital Standard Abacus-28.5cm-Professional 13-Column Soroban Calculator (Functional and Educational Tool) Vintage-Style Chinese Wooden Abacus.

Features

• the abacus from ancient China; its characteristic is that the counting system used before modern numbers is still used by some businessmen, traders and clerks. It is a good tool for mathematics education.
• This 13-digit professional abacus is made of high-quality solid wood and measures 11.22 x 4.72 x 0.86 inches (28.5 x 12 x 2.2 cm) An abacus that makes math exercises more effective; using an abacus to calculate children's mathematical ability is a good way to teach them to count and calculate intelligence.
• It can be used as a classic office calculator, a teacher's, an educational tool for children or a gift for abacus collectors. The abacus is very suitable for fast calculations. It is highly recommended to use it in any math abacus course.
• We're ready beginner classic booklet explaining the essential rules of abacus.