# incredible integers

DESCRIPTION

Intro to integers powerpointTRANSCRIPT

Incredible Integers

What is an integer?

Integers are the whole numbers

and their opposites.

Okay…but what does that mean?

Two integers are opposites if they are the same distance from 0 in

either the positive or negative direction on a

number line.

This means…• Positive integers

are all the whole numbers greater than zero: 1, 2, 3, 4, 5, ...

• Negative integers are all the opposites of these whole numbers: -1, -2, -3, -4, -5, …

• Negative numbers are less than zero.

Let’s look at some examples of opposites!

• -4 and +4

• -2 and +2

• -5 and +5

Integers can also represent situations

Here are some examples:

• Sarah went up four steps

• The temperature is twelve below zero.

• The elevation of the mountain is 52,000 feet

• +4

• -12

• +52,000

And a few more…

• The football team lost 8 yards

• Anne gained 10 pounds

• Tara spent $20 of her checking account.

• -8

• +10

• -$20

You try some!!• The stock market

showed a gain of 212 points today

• Death Valley, California is 282 feet below sea level

• The elevator went down two floors.

• +212

• -282

• -2

Now let’s talk about

Absolute Value

Absolute Value is…

The distance a number is from zero on the number

line.

So…• Absolute value is shown by two bars

on either side of an integer.

• The absolute value of the number is really just the number without a sign (or neither negative nor positive)

4

Unless…

• The negative sign is OUTSIDE of the absolute value bars.

= -4

Here are some examples!

• Example 1:

• Example 2:

= 9

Now you try some!

Time to practice!

Let’s look at the worksheets you just got!

Let’s go!!