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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 can be of various types: 1  Calculator with numeric display. This is the basic level of a scientific calculator, as well as the most inexpensive one. In older versions, the light-emitting diodes (LED) are used to display the numbers, but most calculators are now using a liquid crystal display (LCD).