Lesson 10 Quiz

A gopher is in a hole that is 6¼ in. below the surface of the ground. It then digs 7½ in. deeper. What is the gopher’s new elevation relative to the surface of the ground?

• -13¾ in

• -1¾ in

• 1¼ in

• 13¾ in

Which values of x make the following statement true? Choose all the correct answers.

x - 5.5 = a negative number

• x = 5

• x = -5.5

• x = -6

• x = -5

• x = 6

Michelle is playing a board game. At the end of the first round, she has −2.3 points. During the second round, she gains 4.5 points. During the third round, she loses 6.7 points. What is Michelle’s point value after the third round?

• 8.9

• 5.5

• -4.5

• -13.5

What is 2⅔ - (-3⅓)?

• -6⅓

• 6⅓

• ⅓

• 6

Without calculating, explain how you can tell if the value of the
expression (-2.37) - (-7.91) - (-2.45)  is positive or negative. Explain your reasoning.

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- 3.8 - (-6.1)

• 1.6

• 2.3

• 4.2

• -9.9

- 8.2 - 4.2

• 4

• 12.4

• -12.4

• -4

-12.7 - (-5.6)

• 7.1

• 18.3

• -18.3

• -7.1

3.8 - 6.1

• 2.3

• -2.3

• 9.9

• -9.9

-8.5 - (-9.7)

• 1.2

• -18.2

• -1.2

• 18.2