What is 3 × 3?

Mathematical expressions are a combination of numbers, variables (like x, y, or z), and operators (like +, −, ×, and ÷) that represent a particular value or quantity. For example, 2+3 is a simple mathematical expression. The + is an operator that tells us to add the two numbers together.

The expression 3×3 is a multiplication operation. Multiplication is essentially the operation of adding a number to itself a certain number of times.