Algebra I/Content/Working with Numbers/Integers and the Number Line

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(Note to contributors: Please use the ^ symbol to designate exponents when you enter them in the wikibook. I will format them on the student-user interface.--HSTutorials 00:42, 17 July 2006 (UTC)


  1. Integer: A whole number (both positive and negative).
  2. Number Line: a line marked periodically with numbers
  3. Origin: Zero (0)


An integer is any number, positive or negative, that does not have a fraction or decimal point. Integers can be shown on a number line, like the one below.

The Number Line between the integers -10 and 10

This number line shows the numbers from -10 to (positive) 10. Notice the arrows on either side to show that the numbers continue in both directions even though they are not shown on the line.

Example Problems

Practice Games

Practice Problems

(Note: put answer in parentheses after each problem you write)