Integers

1
Integers

• Objective To read and write integers To find
  the opposite and the absolute value of an integer

2
Integers

• An integer is any number from the set
• , -4, -3, -2, -1, 0, 1, 2, 3, 4,
• RATIONAL NUMBERS (WHOLE NUMBERS)
• WRITE THIS!!! Integers greater than 0 are
  positive integers.
• WRITE THIS!! Integers less than 0 are negative
  integers.
• WRITE THIS!! Zero is neither positive nor
  negative.

3
Write an integer for each situation.

• A loss of 6 yards
• A profit of 5
• A deposit of 10
• 76ºF below 0
• 10 years ago

4
Opposites

• WRITE THIS!! Two numbers on the opposite sides of
  0.
• WRITE THIS!! SAME absolute value!!
• Examples below shows that -4 and 4 are
  opposites.

4 units left 4 units right
-5 -4 -3 -2 -1 0 1 2 3
4 5 6 7
5
Absolute Value

• WRITE THIS Absolute value of an integer is
• Distance from 0 on a number line.
• Always positive.
• Absolute value is helpful when adding integers.
• The absolute value of n is written n . So,
  -4 4 and 4 4.

6
Give the integer represented by each point. Then
find its opposite and its absolute value.
1.
-3 -2 -1 0 1 2 3
-9 -8 -7 -6 -5 -4 -3
Integer -2 Opposite 2 Absolute value 2
Integer Opposite Absolute value
2.
-1 0 1 2 3 4 5
Integer Opposite Absolute value
7
Try These

• Tell why 7.5 is not an integer.
• Represent -6 using counters and a number line.
• Write an integer to describe the year 120 B.C.
• Give the opposite of -7.
• Give the absolute value of -10.
• -6____ 7 _____

8
APRIL 26, 2012

• HOMEWORK Dividing and multiplying Integers
• WARM UP
• Mrs. Cline balanced her checkbook and determined
  that she had a balance of 40. She went to eat
  at Chillis and the bill was 50. She then went
  to Brusters to get ice cream that cost 11. On
  the way she stopped to get gas for 25. Monday
  she deposited 228. What was the final balance in
  her account?