The arrows on each end of the number line show us that the line stretches to
infinity in both the negative and positive direction.
Zero is called the origin, and it's neither negative nor positive.











For every positive integer, there's a negative integer an equal distance from the origin. Two integers that lie the same distance from the origin in opposite directions are called opposites.

For example, "negative 5" is the opposite of "positive 5."




Adding Integers

Subtracting Integers

Multiplying Integers

Dividing Integers





These pages were made through TeacherTECH, the teacher professional development component of GirlTECH, which is sponsored by the Center for Excellence and Equity in Education (CEEE) with support from the National Science Foundation through EOT-PACI, RGK Foundation, the Verizon Foundation, Rice University, and HiPerSoft.

Copyright © June 2002 by Asale Harris.