Adding integers

When adding integers, use a number line to help you think through problems.It will be really helpful.

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.

Adding 6 to 2

Find -2 + 8:

Start at 2 and move 8 units to the right.

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

Adding 8 to -2

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

Adding -7 to 4

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.

Adding -6 to -2

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)

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

Adding integers quiz. Take this quiz to find out if you really understood this lesson.

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