The following is a brief explanation of how to use these numbers. Please remember, the SLU Libraries Catalog will help you find the call number for each item you want. Each book in the library has a ...

Numbers don’t stop at zero. They continue into negative numbers as you count backwards. If you start at 2 and count backwards, you get 2, 1, 0, -1, -2, and the numbers keep going. Take a look at ...

What are positive and negative numbers? Any number above zero is a positive number and any number below zero is a negative number. Learn about positive and negative numbers and number lines.