Restriction (mathematics)

Restriction in mathematics is like a rule that tells you which numbers you're allowed to use in a certain situation. Let's say you have a math problem that involves dividing by a number, but you're not allowed to use the number zero. That's a restriction! It means you have to be careful and make sure you don't accidentally try to use zero in your calculation.

Another example of restriction might be in a geometry problem, where you need to find the area of a triangle but you're only allowed to use certain side lengths. The restriction tells you which side lengths you can use, so you don't waste time trying to calculate the area using the wrong information.

Think of restriction like a set of instructions that help you solve a problem correctly. By following the restrictions, you can be sure that you're on the right track to finding the answer.