Unit 1 The Number System Review Quiz

What is -4 + (-9)?

• 5

• -13

• 13

• -5

Evaluate. Find the answer in its simplest form.

• -18/20

• -11/20

• -2 7/9

• 3 11/20

Evaluate. -27 + 88 - (-16)

• -77

• 77

• 45

• 71

A scuba diver dives until he is 72 ft below sea level. His friend is at -36 ft. How many feet are they away from each other?

• -108

• 108

• 36

• 44

Which number line models -3 + 2?

• Option A

• Option B

• Option C

• Option D

Select all the situations or expressions whose values combine to make zero.

• The hiker began his hike at 100 feet below sea level and descended 100 more feet.

• 45.39 - (+45.39)

• The running back gained 7 yards, then lost 7 yards on the next play.

• Terry deposited $123 into her bank account, and then wrote a check for $123.

Evaluate. 7.29 + (−8.54)

• −15.83

• 15.83

• 1.25

• −1.25

Do these expressions have a positive or negative value? For each equation, choose Positive or Negative to show your answer.

• Positive

• Negative

Are these statements true or false? For each statement, choose True or False to show your answer.

• True

• False

Select all the situations or expressions whose values combine to make zero.

• −9 + 9

• The scuba diver was swimming 8 feet below sea level. She dove 8 feet deeper.

• (−34) + 34

• The boy’s mother gave him $5, then he spent $5 on lunch.