31 Integers and Absolute Value

1
3-1 Integers and Absolute Value

• Homework Read pages 105-106
• Do problems on Pages 107-109
• Math 7 (18-20, 23-26, 30-36, 43-45, 49-56, 71-75,
  83-86)
• Prealgebra (20, 24-26, 30-38, 43-46, 49-54,
  67-69, 70, 71-73, 85-90)

2
Warmup

• 1.) Draw a number line graph the integers
• -2, 0, 3
• 2.) Order the integers from least to greates
• 3.) 5
• 4.)-3

3
3-1 Integers and Absolute Value Definitions

• Integers -3, -2, -1, 0 , 1, 2, 3
• negative integers zero negative integers
• Draw a Number line Graph -4, 3½, 7

-8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4
5 6 7 8
origin
integers
4
Order integers in the order of least to greatest.

• 4, -2, -5, 0, 2
• Graph first
• Now lets reorder from left to right.

-8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4
5 6 7 8
-5,
-2,
0,
2,
4
5
E B J M R KUQ VGF C L A T S P H N D I
-8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4
5 6 7 8
2 minute drill

• List the letters of points whose coordinates are
  given.
• -6, 3
• -3, 5
• 0, -7
• -5,1
• 2, -2, -3 ½
• 0,1, -1 ½
• -3, -5 ½
• -7, -5, 2 ½

• E, S
• Q, H
• C, B
• R, L
• A, V, U
• C, L, G
• Q, M
• B, R, T

6
Absolute value- of a number is the distance
between the number and 0 on the number line.

• Evaluate the absolute value
• Using a number line.
• 1.) -4
• 2.) 6
• 3.) -8
• 4.) 4
• 5.) -5

• 1.) 4
• 2.) 6
• 3.) 8
• 4.) 4
• 5.) 5

Conclusion Absolute value and distance are
always _______numbers.
Distance5
Distance4
Distance8
distance4
Distance6
-8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4
5 6 7 8
7
There is a scuba diver under the ocean 150 feet.
Use absolute value to find the divers distance
to the surface.
-150 150
-50feet
-100feet
-150feet
-200feet