7.NS.A.2.abc Review

Jack’s pond lost  $\frac{3}{8}$   of an inch of water each day for 5 days.  Which of the following expressions could be used to represent the change in the water level?

• -1( $-\frac{3}{8}$   x 5)

•  $-\frac{3}{8}$   x (-5)

•  $\frac{3}{8}$   x 5

•  $-\frac{3}{8}$   x 5 

Evaluate: (-0.3)(-2)(-0.42)

• 0.252

• -0.252

• 2.52

• -2.52

Evaluate  $-24.92\ \div\ \left(-7\right)$  

• 0.356

• 3.56

• -0.356

• -3.56

Evaluate: (-8)(-4)(3)

• -96

• 96

• -72

• 72

Evaluate  $\left(\frac{1}{5}\right)\left(-\frac{5}{8}\right)$  

•  $\frac{8}{25}$  

•  $-\frac{8}{25}$  

•  $\frac{1}{8}$  

•  $-\frac{1}{8}$  

Sam won $8\ \frac{1}{2}$  lbs of candy and shared it evenly with 4 of her friends.  Which of the expressions below could be used to determine how much candy each person received?  Select the two that apply 

•  $\frac{8\frac{1}{2}}{5}$  

•  $\frac{5}{8\frac{1}{2}}$  

•  $8\frac{1}{2}\div5$  

•  $5\div8\frac{1}{2}$  

A water tower has a leak that results in a loss of 42.5 gallons of water every 5 days. What is the average change in water volume each day?

Which expressions are equivalent to  $\frac{-2}{5}$  ?

•  $\frac{2}{5}$  

•  $-\frac{2}{5}$  

•  $\frac{-2}{-5}$  

•  $\frac{2}{-5}$  

•  $-\left(\frac{2}{5}\right)$  

A bat was resting on a rock in a cave at a depth of 15 feet below ground level. The bat moved its position on the cave 3 feet deeper into the cave each hour for 4 consecutive hours. What is the final depth of the bat in relation to ground level?

• 18 feet below ground level

• 18 feet above ground level

• 27 feet below ground level

• 27 feet above ground level

Evaluate 7.8(-5)