Multiplying & Dividing Integers

During a drought, 3 inches of water evaporated out of a lake every hour. What was the change in the amount of water in the lake for a 7-hour period during the drought?

• -21 inches

• -10 inches

• -4 inches

• -1 inches

Which expression is modeled on the number line?

• -2 x 8

• 2 + (-8)

• 1 x (-16)

• 2 x (-8)

Jeff is solving a number puzzle using each of the following equations. Which equation is not correct?

• -40 ÷ (8) = -5

• -36 ÷ (-6) = 6

• 27 ÷ (-9) = -3

• -3 ÷ (-3) = -1

Which expression has a positive value?

• 4 ÷ (-4)

• -15 ÷ (-3)

• 12 ÷ (-6)

• -9 ÷ 3

Which expression has the greatest value?

• -2 x 6

• -1 x (-1)

• 8 x (-2)

• -10 x 1

The temperature fell 4^oF every hour for 6 hours. Which integer represents the total temperature change?

• -2^oF

• -10^oF

• -12^oF

• -24^oF

Which of the following situations does the model represent?

• a diving bell rising to the surface 18 feet every 6 seconds

• a diving bell falling 3 feet in 6 seconds

• a diving bell falling 3 feet every second and a total of 18 feet in 6 seconds

• a diving bell rising to the surface 3 feet in 6 seconds

Which expression has the least value?

• -15 ÷ 3

• 8 ÷ (-1)

• 26 ÷ (-2)

• -10 ÷ 5

Arnie says that each expression below has a negative product. Sam disagrees and says that one expression has a positive product. Which expression has a positive product?

• 4 x (-4)

• -5 x 2

• 3 x (-6)

• -5 x (-3)

Which of the following equations is true?

• -20 ÷ 4 = -5

• 20 ÷ (-5) = 4

• 4 ÷ (-20) = -5

• -5 ÷ (-20) = 4