The counting device you're referring to is called an abacus. It typically consists of a rectangular frame with rods or wires, each holding a number of beads that can slide back and forth. The abacus is used for performing arithmetic calculations by moving the beads to represent different values. It has been used for centuries in various cultures for counting and calculation purposes.
The Chinese abacus.
An Abacus
it is a counting frame with beads. go here to see it http://www.kidestore.co.uk/images/images_big/melissa_and_doug_abacus.jpg
Abacus, also known as a counting frame, is used (mainly) in Asia. Beads on wires, wooden dowels, etc, are representative of numbers.
An abacus is a mechanical device for performing arithmetical calculations. Abaci are usually a wooden frame with beads used to represent numbers.
A device used for adding and subtracting numbers is called a calculator. It can be a simple handheld device or a more advanced electronic model capable of performing various mathematical functions. Additionally, basic arithmetic can also be done using an abacus, which consists of a frame with rods and movable beads that represent numbers. Both tools facilitate quick calculations in everyday tasks.
An umbrella is a common device used for protection from rain. It typically consists of a collapsible canopy supported by a frame, which can be opened to shield against raindrops.
The second calculating device is often considered to be the abacus, which dates back thousands of years and was used for basic arithmetic calculations. It consists of a frame with rods or wires on which beads are moved to represent numbers and perform calculations. The abacus was widely used in various cultures, including ancient Greece, China, and the Middle East, before the advent of more advanced mechanical calculators.
A counting frame is the common name for an abacus. An abacus is a centuries old counting and calculating tool that is still widely used by merchants in Asia and Africa.
The Persian abacus, also known as the "soroban" in Japan or "dust abacus," is a traditional counting tool used in Persia (modern-day Iran) and other regions. It typically consists of a rectangular frame with rods or wires on which beads are strung, allowing for the representation and manipulation of numbers. Users can perform arithmetic operations by moving the beads to represent different values, facilitating calculations before the widespread use of modern calculators. The Persian abacus exemplifies the rich history of mathematical tools in ancient cultures.
an abacus
An Abacus is a device to help do math.It is basically a frame with rods and beads in the rods.One rod will represent ones,the next tens, then hundreds,then thousands.You move the beads up when you want to add and down when you want to subtract.