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Submitted By spooky1210

Words 550

Pages 3

Words 550

Pages 3

The soroban is composed of an odd number of columns or rods, each having beads: one bead having a value of five (called a heavenly bead) and four beads each having a value of one (called earth beads). Each set of beads of each rod is divided by a bar known as a reckoning bar. The number and size of beads in each rod make a standard-sized 13-rod soroban much less bulky than a standard-sized suanpan of similar expressive power.

The number of rods in a soroban is always odd and never less than nine. Basic models usually have thirteen rods, but the number of rods on practical or standard models often increases to 21, 23, 27 or even 31, thus allowing calculation of more digits or representations of several different numbers at the same time. Each rod represents a digit, and a larger number of rods allows the representation of more digits, either in singular form or during operations.

The beads and rods are made of a variety of different materials. Most soroban made in Japan are made of wood and have wood, metal, rattan, or bamboo rods for the beads to slide on. The beads themselves are usually biconal (shaped like a double-cone). They are normally made of wood, although the beads of some soroban, especially those made outside Japan, can be marble, stone, or even plastic. The cost of a soroban can increase depending on the materials.

One unique feature that sets the soroban apart from its Chinese cousin is a dot marking every third rod in a soroban. These are unit rods and any one of them is designated to denote the last digit of the whole number part of the calculation answer. Any number that is represented on rods to…...

...finicky machines and often frustratingly literal. This is because they use the principle of logic; for example, I must always be equal to I. If you type ”one“ the computer wouldn‘t understand it. Every instruction must be precisely entered. The computer does not allow spelling mistakes or typos. History of the Computer When the human finger were over for counting; he began to think to and find ways to count more, so he started developing such devices which can help him to count. In this way human developed different devices and after centuries the computer invented. The following are the some major devices that are developed and play a key role in the development of the modern computer. Abacus Also known as Soroban. It was invented in 450 BC in China. It is a wooden frame with rods fixed vertically and horizontally having beads. This device was used for counting and is considered first calculating device of the world. Later on Russia and Japan also invented Abacuses but these were slightly different form the Chinese Abacus. Napier’s Rods This device was invented by John Napier of Scotland in 17th century and also known as Napier’s bones. This calculating device was combination of rods and by moving those rods calculation were performed. Adding Machine This device is also known as Pascaline. It was invented by a French mathematician Blais Pascal in 1642. He was 17 years old at that time and later on he became a......

Words: 10903 - Pages: 44

...mathematical expression of our natural instinct to raise our heads and refuse to believe that we are the only living beings in such immensity. The Soroban is a special type of abacus, introduced into Japan from China in the fifteenth century, which lets anybody efficiently represent very large numbers and very quickly perform even complex calculations. Many Asian guys also train themselves since a very young age to mentally visualize a Soroban and perform operations on it, thus becoming able to achieve extraordinary mental calculations with extreme efficiency. The technique about mental calculations performed through the Soroban is called "Anzan" and can be properly managed only after training a lot with the abacus number representation. In fact, while the majority of the techniques explained in this book can easily be mastered in a few days and can give excellent results when combined with just a few memory techniques, the Anzan could even require years of training before giving satisfactory results. However, if this is a topic you are interested in and you would like to launch yourself into this path, you can find a lot of interesting tutorials simply by searching "Soroban calculation" or "Anzan" on YouTube. Also, if you have any touchscreen device, you can find some interesting app that let you easily emulate operations on a real Soroban abacus. Through a formula, you can determine the day of the week of any day between the seventeenth and twenty-second centuries. As a......

Words: 40638 - Pages: 163