Integers

SOL 6.3by Kathy Woodard

6.3 The student willa) identify and represent integers;b) order and compare integers; andc) identify and describe absolute value of integers.

Above Sea Level

Sea Level

Below Sea Level

Image from http://www.buzzhawaii.com/Tropical_Ocean_Fun_Cruise_-_Oahu

How Many Feet Above Sea Level?

http://geology.com/state-map/virginia.shtml

+166 ftRichmond

+5,729 ft

Mt. Rogers

Put the Data on a SpreadsheetFor each red dash enter the feet above sea level, and make a bar graph of the data to see a side view of VA!

How Many Feet Below Sea Level?

650 ft

Positive Numbers

Sea Level

Negative Numbers

Image from http://www.buzzhawaii.com/Tropical_Ocean_Fun_Cruise_-_Oahu

Google Earth Map

Feet above sea levelPositive

Feet below sea levelNegative

Graph of Feet Above or Below Sea Level for Virginia from Mountains to

Atlantic Ocean Floor

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

-25000

-20000

-15000

-10000

-5000

0

5000

10000 Positive numbers

Negative numbers

whole numbers, their negative opposites, and zero

Integers:

Positive numbersNegative numbers

Zero

http://www.showmethemath.com/Concepts_Explained/oppositeNumbers.html

Show Me the Math

Find the opposite of a given integer.

Opposite of an Integer

K A T H Y

K =A=T=H=Y=

Find the Value of a Point

Comparing Integers

• How can you tell which integer is greater?• Put them on a number line! Smaller <-------- ---------> Bigger

Practice

• Compare the integers by writing < or > • 6 -6• 0 -10• 5 7• 5 -7• 1 -8

Practice

• Compare the integers by writing < or > • 6 > -6• 0 > -10• 5 < 7• 5 > -7• 1 > -8

http://www.mathgoodies.com/lessons/vol5/compare_order.html

Real Life Integers

http://www.xpmath.com/forums/arcade.php?do=play&gameid=61

XP Math

Practice comparing integers.

Compare Integers

http://www.showmethemath.com/Concepts_Explained/absoluteValue.html

Show Me the Math

Good visualization of absolute value in an interactive applet.

Absolute Value

BrainPop Absolute Value

http://www.brainpop.com/math/numbersandoperations/absolutevalue/preview.weml

http://www.explorelearning.com choose Comparing and Ordering Integers

Explore Learning

Plot 4 integers on a number line and then click to show their opposites and absolute values.

Graph Integers & Absolute Value

1. Place the following points on a number line: Z: 4 M: -7 W: -10 T: 0

2. Write >, =, or < to compare the integers: 1 -1

3. Write >, =, or < to compare the integers: 3 -54. What is the opposite of 7?

5. Which of these are integers?½ 0 -300 4.75 27

6. What is the absolute value of -25 ?

7.

8.

07 SOL 6.5*

06 SOL 6.5*

07 SOL 6.5*

08 SOL 6.5