Adding Integers

All the information you need to successfully add positive and negative numbers.

First of all, What is an Integer?

Integers are all of the whole numbers, and their opposites, including zero.

(. . . -3, -2, -1, 0, 1, 2, 3, . . .)

You can see the integers on the number line below.

-5 -4 -3 -2 -1 0 1 2 3 4

The arrows at the ends show that integers go forever in both direction.

Ok, so what isn’t an integer?

Integers can’t be fractions or decimals, unless those fractions or decimals are equivalent to a whole number.

For example: ⅖ or 1.25 can’t be written as whole numbers, and are NOT integers.

Now, let’s learn how to perform the various calculations with integers. We will learn the rules for accurately adding, subtracting, multiplying and dividing integers.

And sorry, that doesn’t mean you get to use a calculator.

We get to use our BRAINS instead!

Adding Integers

We will take a look at a few ways to add integers.

1. The number line model

2. The chip model

3. Using formal rules

If you learn all three ways then you have different ways to attack a problem, and can choose which you like best.

The number line model

Try these using the number line model

Here are the answers

How’d you do?

Question time

How did you like using the number line model?

What about it made things easier or harder for you?

What part of the number line model did not makes sense to you?

Could you use this to solve addition problems if you had to?

The Chip Model

Try these using the chip model

Here are the answers

How did that go for you?

Question time

How did you like using the chip model?

What about it made things easier or harder for you?

What part of the chip model did not makes sense to you?

Could you use this to solve addition problems if you had to?

Using The Formal Rules

Try These using the formal rules

Here are the answers

Get’em all right?

Question time

How did you like using the formal rules?

What about it made things easier or harder for you?

What part of the formal rules did not makes sense to you?

Could you use these rules to solve addition problems if you had to?

Credits

All video content was provided with permission by Youtube user Bullcleo1

Click his username to access his Youtube page.