incredible integers

18
Incredible Integers

Upload: ejboggs

Post on 12-Nov-2014

17.294 views

Category:

Economy & Finance


1 download

DESCRIPTION

Intro to integers powerpoint

TRANSCRIPT

Page 1: Incredible Integers

Incredible Integers

Page 2: Incredible Integers

What is an integer?

Page 3: Incredible Integers

Integers are the whole numbers

and their opposites.

Page 4: Incredible Integers

Okay…but what does that mean?

Page 5: Incredible Integers

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

either the positive or negative direction on a

number line.

Page 6: Incredible Integers

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.

Page 7: Incredible Integers

Let’s look at some examples of opposites!

• -4 and +4

• -2 and +2

• -5 and +5

Page 8: Incredible Integers

Integers can also represent situations

Page 9: Incredible Integers

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

Page 10: Incredible Integers

And a few more…

• The football team lost 8 yards

• Anne gained 10 pounds

• Tara spent $20 of her checking account.

• -8

• +10

• -$20

Page 11: Incredible Integers

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

Page 12: Incredible Integers

Now let’s talk about

Absolute Value

Page 13: Incredible Integers

Absolute Value is…

The distance a number is from zero on the number

line.

Page 14: Incredible Integers

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

Page 15: Incredible Integers

Unless…

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

= -4

Page 16: Incredible Integers

Here are some examples!

• Example 1:

• Example 2:

= 9

Page 17: Incredible Integers

Now you try some!

Page 18: Incredible Integers

Time to practice!

Let’s look at the worksheets you just got!

Let’s go!!