Question

What is abacus
Who invented abacus
Why abacus is necessary

Answer 1

A frame containing wires with small balls that move along them its called abacus....... , babylonians invented the abacus in 300 bc........... abacus is important becouse it improves and boost memory of child , it also improve creativity of child... ✌️✌️✌️✌️✌️✌️

Answer 2

Answer:

BRAINLIEST AND HOPE IT HELPS U

Step-by-step explanation:

Tim Cranmer

An adapted abacus, invented by Tim Cranmer, called a Cranmer abacus is still commonly used by individuals who are blind. A piece of soft fabric or rubber is placed behind the beads so that they do not move inadvertently. This keeps the beads in place while the users feel or manipulate them.Merchants who traded goods needed a way to keep count (inventory) of the goods they bought and sold. ... The abacus is one of many counting devices invented to help count large numbers. When the Hindu-Arabic number system came into use, abaci were adapted to use place-value counting.