Adding and Subtracting IntegersReview for Test #1

3 + (-15)

ANSWER

Different signs subtract. Take the sign of the greater number, then you’ll be exact.

-12

-7 + (-2)

ANSWER

Same signs, keep and add.

-9

-6 + 11

ANSWER

Different signs subtract. Take the sign of the greater number, then you’ll be exact.

5

-4 - 6

ANSWER

Use a number line. Go to the left when negative and to the left when subtracting.

-10

- 5 – (-8)

ANSWER

Use a number line. Go to the left when negative and to the right if there’s a negative and subtraction together. - (-8) means do the opposite of subtracting 8.-5 + 8 = 3

The low temperature in Anchorage, Alaska, is -15°F wile the low temperature in Lindale, Texas is 32°F. Write an expression to find the difference between the low temperatures in Lindale and Anchorage, then solve.

ANSWER

32 – (-15)47

Kyle received a notice from his bank that his account was overdrawn by $14. He made a deposit that brought his balance to $50. How much money did Kyle deposit?

ANSWER

-14 + x = 50x = 64

A submarine travels 330 feet below sea level. If the submarine ascends 125 feet, what integer expresses the submarine’s new position?

ANSWER

-330 + 125

-205

When Bonita started driving at 4pm, the temperature was 12°F. When she arrived home at 10pm, the temperature was -5°F. What was the difference in the temperatures at 4pm and 10pm?

ANSWER

12 – (-5)

17

During the first round of a game, Ravi had a score of -27 points. He earned 35 points in the second round. What was Ravi’s score after the second round?

ANSWER

-27 + 35

8

By noon, the temperature increased 21 degrees from the morning low of -13°F. What was the temperature at noon?

ANSWER

-13 + 21

8

A shark swims at a depth of 275 feet below sea level. After sighting a whale, the shark moves 190 feet closer to the surface. What integer represents the shark’s new depth?

ANSWER

-275 + 190

-85

Which best describes the classification for the following number set?

{ -1 3.5 13

A. Counting NumbersB. Whole NumbersC. IntegersD. Rational Numbers

ANSWER

Rational Numbers- any number that can be written as a fraction is considered to be a rational number

Give the set of numbers below, which are classified as integers?

10 1.25 -2 -3.3 0

Answer

10, -2, and 0

The other numbers would be classified as rational numbers.

What value does point B represent on the number line?

What is the opposite of point B?

What is the absolute value of point B?

Answer

What value does point B represent on the number line? -7

What is the opposite of point B? 7

What is the absolute value of point B? 7 (Point B is 7 numbers away from zero.)

Mrs. Martin is thinking of 2 mystery numbers. She gives 2 clues as shown in the table.Clue 1: The numbers are opposites.

Clue 2: The distance between the numbers on the number line is 20.

What are the mystery numbers?A.-5 and 5B.-10 and 10C.-15 and 15D.-20 and 20

ANSWER

Mrs. Martin is thinking of 2 mystery numbers. She gives 2 clues as shown in the table.

Clue 1: The numbers are opposites.

Clue 2: The distance between the numbers on the number line is 20.

What are the mystery numbers?A.-5 and 5B.-10 and 10 C.-15 and 15D.-20 and 20

Which statement is NOT true about the number line?

A. Points L and H represent opposite integers.

B. The value of point G is equivalent to the absolute value of point M.

C. The value of point F is the opposite of the value of point N.

D. The absolute value of point I is the same as the absolute value of point J.

Answer

Which statement is NOT true about the number line?

A. Points L and H represent opposite integers.

B. The value of point G is equivalent to the absolute value of point M. Point G has a value of -6 and the distance of point M from zero is 6. These are NOT equivalent values.

C. The value of point F is the opposite of the value of point N.

D. The absolute value of point I is the same as the absolute value of point J.

Arrange the following numbers in order from least to greatest.

3 -5 -2 0 -1

Answer

-5, -2, -1, 0, 3

Write an equation that could be represented by the model shown.

ANSWER

Write an equation that could be represented by the model shown.

-4 + 3 = -1-4 – (-3) = -1