安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- Abacus - Wikipedia
Abacus-based mental calculation (AMC), which was derived from the abacus, is the act of performing calculations, including addition, subtraction, multiplication, and division, in the mind by manipulating an imagined abacus
- How to Use an Abacus (with Pictures) - wikiHow
The abacus (the suanpan is the most useful variety) is a deceptively simple calculating tool still used all over the world It's a useful learning device for the visually impaired, as well as for anyone who wants to learn the roots of the modern calculator
- Abacus | Definition, History, Origin, Facts | Britannica
Abacus, calculating device, probably of Babylonian origin, that was long important in commerce It is the ancestor of the modern calculating machine and computer The abacus was in universal use in Europe in the Middle Ages, as well as in the Arab world and in Asia
- Home | Abacus
IT'S WHAT WE DO Abacus serves a wide and growing group of industries Our employees can be found supporting clients of all types Click and view many of the industries where we have had extensive growth
- Abacus Insurance
We provide you with online access for quoting, order placement, policy issuance Your clients can download their policies, view coverages and issue certificates of insurance in real-time so you can spend more time growing your business
- Abacus - New World Encyclopedia
An abacus (plurals abacuses or abaci), also called a counting frame, is a calculating tool for performing arithmetical processes, often constructed as a wooden frame with beads sliding on wires
- Amazon. com: Abacus
Abacus for Kids Math - Wooden Abacus with 100 Counting Sticks and 112 Math Cards, Counting Toys for Preschool Learning, Educational Math Toys for Developing Fine Motor Skills, Math Calculation 300+ bought in past month Ages: 36 months - 6 years Add to cart
- abacus - Wiktionary, the free dictionary
Abacus is a table wiþ þhe whiche schappes be portrayed and i-peynt in powdre, and abacus is a craft of geometrie He [Gerebertus] was the first who took the abacus of the Saracens and gave rules for it, which can be barely understood by the most learned men of the craft, whose craftsmen are called abacists
|
|
|