Estándar digital Ábaco-28.5cm-Profesional Calculadora Soroban de 13 columnas (herramienta funcional y educativa) Ábaco de madera chino de estilo vintage.

Descripción

Product description Digital Standard Abacus-28.5cm-Professional 13-Column Soroban 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. Professional 13-Column Soroban Calculator (Functional and Educational Tool) Vintage-Style Chinese Wooden Abacus. 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) . When using, it is necessary to lay it flat on the desktop and not stand upright for use. The production of an abacus. It is made of wood by hand, with copper fittings at the corners, making it more solid and durable. Packaging of abacus. This abacus is packaged in exquisite colored boxes. Users can easily store them, and you can also send gifts to the elderly and children. People who like abacus can use it for collection. Operating instructions for abacus. This manual provides detailed instructions on how to use an abacus and teaches you basic calculation methods, including addition, subtraction, multiplication, and division.

Características

• el ábaco de la antigua China; su característica es que algunos empresarios, comerciantes y empleados todavía utilizan el sistema de conteo utilizado antes de los números modernos. Es una buena herramienta para la educación matemática.
• 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.

Especificaciones