Integers and Rational Numbers

Altitude above sea level is given in positive values and below sea level is given in negative values. Which situation describes a hiker in Death Valley stopping at an altitude of 0 feet?

• The hiker starts at -10 feet then increases altitude by 10 feet.

• The hiker starts at -10 feet then decreases altitude by 10 feet.

• The hiker starts at 10 feet then increases altitude by 10 feet.

• The hiker starts at 0 feet then decreases altitude by 10 feet.

Which expression is equivalent to 4 - (-7)?

• 7 + 4

• 4 - 7

• -7 - 4

• -4 + 7

Yesterday, the temperature at noon was 11.4 degrees Fahrenheit. By midnight, the temperature had decreased by 15.7 degrees. What was the temperature at midnight?

• -4.3

• -11.4

• -15.7

• -27.1

What is the value if the expression below?

(3/8) + (-4/5) + (-3/8) + 5/4

• 0

• 1/20

• 9/20

• 2 4/5

What is the value of the expression below?

-0.75 - (-2/5) + 0.4 + (-3/4)

• -1.5

• -0.7

• 0.8

• 2.3

What is the product of (-1/4) x (-3/7)?

• -7/12

• -3/28

• 3/28

• 7/12

What is the value of the expression?

(8/15) / (-0.35)

• -75/14

• -32/21

• -21/32

• -14/75

A number, n, is multiplied by -5/8. The product is -0.4. What is the value of n?

• -16/25

• -1/4

• 1/4

• 16/25

Doug earns $10.50 per hour working at a restaurant. On Friday he spent 1 3/4 hours cleaning, 2 1/3 hours doing paperwork, and 1 5/12 hours serving customers. What were Doug's earnings?

• $46.97

• $47.25

• $53.00

• $57.75

What is the value of the expression below?

(3 1/2 - 9 3/4) / (-2.5)

• -2.5

• -2.3

• 2.3

• 2.5