Which term refers to the functions used in mathematical expressions and equations?

• A. Variables
• B. Operations
• C. Equations
• D. Constants

Answer: (B)

The main idea is the actions you perform on numbers or variables in math expressions. These actions are called operations. Addition, subtraction, multiplication, and division are the basic operations you apply to values to combine them or change them. They’re the functions that operate on inputs inside expressions and equations. For example, in an expression like 5 × y, the multiplication is the operation that combines 5 and y to produce a result. The other terms describe different roles: variables are placeholders for unknown values, constants are fixed numbers, and an equation is a statement that two expressions are equal.