basic mathematics image
 basic mathematics image

Adding integers


When adding integers, use a number line to help you think through problems..



For example: 2 + 6

Start at 2 and move 6 units to the right.

Since you stopped at 8, the answer is 8

Notice that you would get the same answer if you start at 6 and move 2 units to the right.

numberline-image

Find -2 + 8:

Start at 2 and move 8 units to the right.

Since you end up at 6, the answer is 6.

numberline-image

Find 4 + -7

Start at 4.

Here the number you are adding to 4 is a negative number(-7), so you have to move 7 units to the left.

After you do that, you will end up at -3, so the answer is -3

numberline-image

Find -2 + -6

Start at -2

Once again, the number you are adding is a negative number(-6), so you will move 6 units to the left.

You will end up at -8, so the answer is -8

numberline-image

Other examples:

-1 + 8 = 7 ( Start at -1 and move 8 units to the right).

4 + -4 = 0 ( Start at 4 and move 4 units to the left).

7 + -9 = -2 ( Start at 7 and move 9 units to the left).

-5 + 3 = -2 ( Start at -5 and move 3 units to the right)

Use the following adding integers calculator to practice

      + =   

        

Other related topics related to integers are modeling integers with chips , integers and inductive reasoning ,and consecutive integers



Fun math game: Destroy numbered balls by adding to 10






sitesforteachers.com Top Sites In Education Teacher-sites-image sitesforparents.com



Page copy protected against web site content infringement by Copyscape


















Enjoy This Site?
Then why not use the button below, to add us to your favorite bookmarking service?



Copyright © 2008. Basic-mathematics.com. All right reserved