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Making the world better, one answer at a time. Calculators help in making technical math problems easy. The three most common types of calculators are handheld calculators, printing calculators, and scientific calculators. Calculators help in making technical math problems easy. The three most common types of calculators are handheld calculators, printing calculators, and scientific calculators.
The calculators that we use today are the advanced versions of a device that, when invented, was in its primitive form and was called the adding machine. Abacus. THE abacus wasnât a machine but a tool used for counting that was invented before 2000BC. Considered the basis on which the modern calculator has taken its shape, an abacus consisted of small ball-shaped beads that slid on sticks and the sticks were attached to a rectangular frame.