Aritmetik, or arithmetic, is a branch of mathematics that deals with the basic operations of numbers. These operations include addition, subtraction, multiplication, and division. Aritmetik is fundamental for everyday calculations, such as budgeting, measuring, and comparing quantities. In addition to basic operations, aritmetik also involves concepts like fractions, decimals, and percentages. Understanding these concepts is essential for solving more complex mathematical problems and is widely used in various fields, including science, engineering, and finance.