Transcript Positive and Negative Numbers

Interesting Integers!
What You Will Learn



Some definitions related to integers.
Rules for adding and subtracting
integers.
A method for proving that a rule is true.
Are you ready??
Definition

Positive number – a number
greater than zero.
0 1 2 3 4 5 6
Definition

Negative number – a
number less than zero.
-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6
Definition

Opposite Numbers – numbers
that are the same distance from
zero in the opposite direction
-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6
Opposite Numbers




These are also known as Zero Pairs
Because if we add the opposites
together we get ZERO for an answer.
+7 + -7 = 0
-4 + +4 = 0
Definition

Integers – Integers are all the
whole numbers both positive
and negative and zero.
Negative Numbers Are Used to
Measure Temperature
Negative Numbers Are Used to
Measure Under Sea Level
30
20
10
0
-10
-20
-30
-40
-50
Negative Numbers Are Used to
Show Debt
Let’s say your parents bought a car but
had to get a loan from the bank for $5,000.
When counting all their money they add
in -$5.000 to show they still owe the bank.
Hint

If you don’t see a negative
or positive sign in front of a
number it is positive.
+9
Ordering integers-least to greatest
9, 4, -3, 0, -2,-9
6,7,-2,0,-7,-13,10
Absolute Value
The distance the number
Is from zero.
It is written as |-5| or |5|
|-5| is equal to |5|
They are the same
distance from ZERO
Order the following from
least to greatest
0 -5 4 -3
|-3| |-6| |5|
Give integer & its opposite integer
250 feet below sea level
32 degrees
$35 withdrawal
Win of 2 points
Homework pg 253 2-24 evens
Pg 253 2-24 even
#2 – 1,333 feet above sea
level -+1,333 -1,333
#6 -2 < 5
#12 -5
-5 -4 -3
5 degrees below zero
borrowed $5.00
5 feet below sea level