Standard Calculator

 
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Basic features:
  • Arithmetic operations: +, -, ×, ÷
  • Sign change and reciprocal: ±, 1/x
  • Find 1 percent of a number: %
  • Square and root: , √x
  • Clear and delete buttons: Clear,
  • Working with decimal numbers: .

Decimal number system

Decimal number systemis a positional number system naturally used by humans, based on 10 digits. Used in most calculators, user interfaces, and all areas of mathematics.

The decimal number system uses the following digits: 1, 2, 3, 4, 5, 6, 7, 8, 9, 0.