What is 10 − 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.

Subtraction is the process of taking away a number from another number. When we say 10 − 3, we're asking "what is left if we take 3 away from 10?"

Let's illustrate this with a simple example. If you have 10 apples and then you give away 3 apples, how many apples do you have left? To find out, you would subtract the number of apples you gave away (3) from the total number of apples you had initially (10).