### Functions

A mathematical function is a set of ordered pairs that assigns a unique output value to each input value. Functions are often represented by symbols, …

Arithmetic is a branch of mathematics concerned with the basic operations of addition, subtraction, multiplication, and division, and the study of numbers and their properties. It forms the foundation of more advanced mathematical concepts and is widely used in daily life and many areas of science and technology. Arithmetic is often taught at a primary or secondary school level and is a fundamental skill necessary for solving mathematical problems.