Tool to calculate automatically with the abacus. Soroban is an evolution of Chinese abacus developed in Japan. It contains 1 quinary and 4 unary to count between 0 and 9.

dCode is free and its tools are a valuable help in games, puzzles and problems to solve every day! You have a problem, an idea for a project, a specific need and dCode can not (yet) help you? You need custom development? Contact-me!

Tool to calculate automatically with the abacus. Soroban is an evolution of Chinese abacus developed in Japan. It contains 1 quinary and 4 unary to count between 0 and 9.

Answers to Questions

What is a Soroban? (Definition)

A soroban is a Japanese abacus that has a quinary (for the value 5) and 4 unaries (for the value 1). It behaves like a classic abacus and allows you to add, subtract, multiply or divide.

How to use a Soroban?

The soroban stands horizontally, so that the quinary is at the top and the unaries at the bottom.

In its initial position, the balls are pushed outwards and all the columns show O-|-OOOO.

The count in base 10 is done as an addition: the 1 and the 5 are added for each column representing the units, then the tens, then the hundreds, etc. (from left to right)

Example: O-|O-OOO O-|OO-OO gives number 12

0

O-|-OOOO

1

O-|O-OOO

2

O-|OO-OO

3

O-|OOO-O

4

O-|OOOO-

5

-O|-OOOO

6

-O|O-OOO

7

-O|OO-OO

8

-O|OOO-O

9

-O|OOOO-

Ask a new question

Source code

dCode retains ownership of the source code of the script Soroban online. Except explicit open source licence (indicated Creative Commons / free), any algorithm, applet, snippet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in any informatic langauge (PHP, Java, C#, Python, Javascript, Matlab, etc.) which dCode owns rights will not be given for free. So if you need to download the online Soroban script for offline use, check contact page !