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Details about  Japanese Office Abacus Soroban Visual Math School Learning Aid Tool

Japanese Office Abacus Soroban Visual Math School Learning Aid Tool
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Item Information

Item condition:
New
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More than 10 available / 289 sold
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Price:
US $8.95
Approximately C $10.05(including shipping)
 
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289 Sold
New Condition
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US $8.80 (approx. C $9.88) USPS First Class Mail Intl / First Class Package Intl Service | See details
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Item location:
San Lorenzo, California, United States
 
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International shipping and import charges paid to Pitney Bowes Inc. Learn More- opens in a new window or tab
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14 day money back, buyer pays return shipping See details
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eBay item number:
370899552570
Seller assumes all responsibility for this listing.
Last updated on  May 28, 2014 14:41:50 EDT  View all revisions

Item specifics

Condition:
New: A brand-new, unused, unopened, undamaged item (including handmade items). See the seller's listing ... Read moreabout the condition
Holiday Gift Giving Idea:

2013 Stocking Stuffer

Child Educational Idea:

Teacher Tutor Visual Math Aid

 

Japanese Office Abacus Soroban Visual Math School Learning Aid Tool

IMPORTANT NOTES

Please know that items purchased from us will be shipped direct from California. Your item will arrive much sooner and the shipping cost will be far less than items being shipped direct from Japan. Take advantage of our combined shipping to save even more!

DETAILS OF ITEM

This piece measures 8 inches long by 2.5 inches wide by 0.75 inches thick. Soroban or an abacus is a type of calculator used in banks, businesses and at homes for over 450 years in Japan. Encased in a strong durable frame and suspended with rods, the top beads represent fives and bottom beads represent ones. Each column represents a decimal point giving the total of a 13 digit number and beads are counted by sliding them on the rods.

When one of the columns is set as the ones column, in this case the 4th column from the right, the next adjacent to the left becomes the tens column, then hundreds, thousands, ten thousands and so on. The decimal fraction can be displayed on the right side of the ones column as well.

In Japan, the art of using the abacus has been carefully cultivated. In 1928, the Japanese Chamber of Commerce and Industry established standardized abacus examinations and many millions of people had been participating to take the test to be certified. Although computers now carry out complex calculations, abacus is still used in offices, shops alongside computers and electronic calculators even today.

Abacus is also a very useful tool in general mathematics education because of its concrete visible display of numbers by beads that enable students to grasp of numbers, particularly in understanding place value. As a math tool, abacus has been continuously used by the blind and visually impaired in Japan since the first school for the blind was established late in the 19th century.

The earlier prototype abacus consists of a rectangular wooden frame divided into two parts by a beam, with two rows of 5- beads in the upper deck instead of one bead and five 1-beads in the lower deck called the Mutsudama type Soroban. This is probably close to the original style when abacus came from China and this was because the Chinese unit of weight was base sixteen count, 15 numbers (two 5- beads plus five 1- beads) in each column were needed.

This style was slightly modified in the early Meiji Period (1868-1912) and replaced by only one 5-bead in the upper deck, called the Itsutsudama Soroban. Most people had switched to this style from the older Chinese style by around the 1880. In the 1930's, yet another modification was implemented by reducing the lower deck to just four 1-beads, called the Yotsudama Soroban like this piece. This was because one 5-bead and four 1-beads were considered sufficient to do all the calculations.

When primary school textbooks were revised in 1935, the four-beaded Yotsudama Soroban became the standard. This is a brand new piece and the condition is excellent. It would make a great gift for that budding mathematician or the collector of primitive calculators.

PLEASE VISIT MY EBAY STORE BY CLICKING THE LINK ABOVE TO EASILY BROWSE BY CATEGORY ALL OF THE OTHER JAPANESE ANTIQUES AND COLLECTIBLES THAT ARE UP FOR AUCTION THIS WEEK. IF YOU LIKE WHAT YOU SEE, PLEASE BOOKMARK OUR AUCTIONS TO EASILY FIND US. THANKS FOR VIEWING THIS AUCTION.

A FEW IMPORTANT NOTES:

If you have any questions concerning this or other items we have up for auction, please don't hesitate to email me for an answer. We will do our best to email you a reply within one day. It is best to get your questions in early since we may not be available to respond to you within minutes or hours of the auction end. Of course, we will try to reply if it is possible.

For all of those who wish to combine items, please email me to let me know of your intent and I will email you confirming this. This allows us to keep your winning items aside until you are ready to finalize your purchases. Items can only be combined for a two week period starting with the earliest winning item marking the beginning of the period.

California residents will be charged a sales tax of 8.75% unless a valid California resale card is on file with us.

 

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Item location: San Lorenzo, California, United States
Shipping to: Worldwide
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