By bringing in negative numbers, we have solved our subtraction problem. 3 - 8 is just -5. Putting together the positive numbers, ... Negative numbers do not have square roots in the real numbers.

Prime numbers are positive integers greater than 1 that can only be divided evenly by 1 and themselves. These numbers are important in many areas of mathematics, including number theory ...

Which might lead you to wonder: Instead of just adding up the first 100 positive integers, is there a way to quickly calculate the sum of the first 50, 200, or maybe even 1,000 positive integers?

That’s positive and negative numbers. So first, let’s see what’s been paid into the bank. Here are the paying in slips. Now this can be Polly positive. Anything above zero is positive.