Cool math Pre-Algebra Help Lessons: Signed Numbers (Integers)

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Coolmath Pre-Algebra
Signed Number (Integers) lesson 6 - Addition with the Same Sign
(page 3 of 4)
---- This pre-algebra lesson explains how to add signed numbers (integers) when the signs
are the same.

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Graphing Calculator	Scientific Calculator	<< a new window will open for these

If the number you are adding is negative, the car backs up!

-1 + -3 = -4

press the purple "play" button to start the car

Try it:

-2 + -5 =

It works when you are adding more than two numbers too!

What's the answer to this one?

2+4+1=

Yep!

2+4+1=7

Here it is on the number line:

a number line showing 2+4+1=7

Here it is with the car:

press the purple "play" button to start the car

Continued on the next page

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Graphing Calculator	Scientific Calculator	<< a new window will open for these

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