Unit 1 Exam

Kesia is practicing her free throws. She made 5/8 of the shots she took at basketball practice today. Part A: What is the decimal equivalent of 5/8?

• 0.5

• 0.625

• 0.75

• 0.8

Which expression has a negative value?

• -12 × (-8)

• -72 ÷ (-9)

• -11 × 6

• -14 + 24

The temperature of a liquid in an experiment starts at 0°C. The experiment calls for the temperature of the liquid to change at a rate of -0.8°C per minute. How long will it take for the liquid to reach -10.8°C?

• 12 minutes

• 13.5 minutes

• 14 minutes

• 15 minutes

Julian saves 5/7 of the money he makes babysitting. What is 5/7 written as a decimal?

• 1.4

• 0.7

• 5/7 cannot be written as a decimal.

Look at the following equations. Choose True or False for each equation. -2.5 + (-3.5) = -6

• True

• False

• True

• False

• True

• False

• True

• False

Which of the following expressions represents a positive number? Choose all that apply.

• -2.25 - (-3)

• 2.3 + (-2.4)

• 4 - (-2)

• -1/2 + (-3/4)

• -7/8 - (-6/7)

In which situation do the quantities combine to make 0?

• Juan spent $20. The next day, he earned $10 per hour for 2 1/2 hours of babysitting.

• Erica deposited $75 into her savings account. She withdrew $75 the following week.

• The predicted high temperature for a winter day is 7°C and the predicted low temperature is -7°C.

• A deep-sea diver descends 15 meters, pauses, and then descends another 15 meters.