Name two manual calculating devices.
Answers
Answer:
1.Abacus
1.Abacus2.Vaccum Tube
1.Abacus2.Vaccum Tube3.Analytical Engine
Two manual calculating devices are - Abacus and Napier's bones.
Manual calculating devices are the devices help people in doing mathematical operations.
These devices provide assistance, but the intelligence of humans is used for working on these devices.
One needs practice and knowledge to operate these devices.
Napier's bones is the device which was created to calculate products of numbers and quotients, thus helping in multiplication and division.
John Napier is the person, who is credited for the invention of this device.
Abacus is the device which can helps in all the basic arithmetic mathematical operations. The device has rods and beads.
There is a horizontal division seperating five beads, present in a column, in the ratio 1:4.