Final answer:
Abacus, mathematical tables, and Pascaline were three means of performing calculations before modern computers.
Explanation:
Before the arrival of modern computers, three means of performing calculations existed:
- Abacus: An ancient calculating tool that allows for addition, subtraction, multiplication, and division.
- Mathematical table: Tables containing pre-calculated values for mathematical functions to aid in computations.
- Pascaline: A mechanical calculator invented by Blaise Pascal in the 17th century to assist in arithmetic calculations.
Learn more about pre-modern means of calculations here:
https://brainly.com/question/43469475
