Directed Numbers & Absolute Value

What does this guy have to do with Mrs. Sheguit’s math experience???

Directed Numbers

Directed numbers are vectors.

Order these numbers from least to greatest.

a)  3, -6, 0, -5, 7, -1

-6, -5, -1, 0, 3, 7

a) 2, 2.68, 2.2, 2.6, 2.11, 2.3

2, 2.11, 2.2, 2.3, 2.6, 2.68

Order these numbers from least to greatest

c) -4, -3.5, -4.3, -4.78, -4.7, -3

-4.78, -4.7, -4.3, -4, -3.5, -3

d) -5.6, 5, -5.9, -6, 4, 4.8, 0

-6, -5.9, -5.6, 0, 4, 4.8, 5

Absolute Value

The absolute value of a number is its distance from zero.

In other words, absolute value is the magnitude of the number without direction.

Looks like:

Absolute Value, continued.

Absolute Value is a distance.

Distance cannot be negative, so absolute value cannot be negative!!

Absolute Value Continued: A) 

B)

C)

D)

5 12

8.34 0

Hmmmm…. What about these?

A) Order from least to greatest:

B)

C)

See pictures next slide

g = -45 and 45

How would you describe the divers location?

Sea Level : 0 ft

150

ft

150 feet below sea level

Jack : 11 Queen : 12 King : 13 Ace : 14 BLACK: POSITIVE NUMBERS RED: NEGATIVE NUMBERS