# Are rational and irrational numbers real numbers?

Yes.

A common explanation for real numbers is that they are all the numbers on a number line.

Think about the two basic categories of numbers on the number line: the rational numbers, which are those that we can represent as a fraction of two integers, like:

and the Irrational Numbers, which are those that we are unable to express as a fraction:

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Yes, both rational and irrational numbers are considered real numbers.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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- Mr Williams is buying some new books for his school. He buys 292 books, each costing £18.75 What is the total cost of the books?
- How do you solve #(8*4)-:(9*6-5*7)#?

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