2.1 Adding Integers

Focus Question: How can we predict whether the sum of two integers will be positive, negative, or zero?

In this lesson, we will explore two different models for adding integers and then work as a group to develop some algorithms (rules) for adding integers.

Here is a final overview of the Integer Chip model for addition.  Remember that your notes should look like the notes that have been written on the image below.

By the end of this class, you should be able to do the following:

• Use either a number line or integer chip model to add integers.
• Add integers mentally
• Describe an algorithm for adding integers with the same sign (both positive or both negative) and an algorithm for adding integers with two different signs.

Here is what you MUST have completed before next class:

1. ACE (1-14) p. 44
2. Watch the video on "Subtracting Integers" and complete the note-taking sheet that goes with it.

Here is some extra practice with adding integers if you would like:

1. Adding Integers on Khan Academy