What is the difference between abacus and calculator?

Answer 1

The difference is that an abacus uses beads to calculate. A calculater uses solar energy or batteries to make its digital numbers.

In other words an abacus uses beads and a calculater uses buttons you press to put numbers on the calculaters screen.

Answer 2

An abacus and a calculator both represent numbers in decimal, after that there is no similarity whatsoever.

Answer 3

It's an ancient Chinese calculator.

Answer 4

Calculator is electric