Adding and Subtracting Integers Review

Important Concepts

100

Absolute Value

The distance of a number from zero

200

Integer

Positive and negative whole numbers and 0

300

What are opposites?

Numbers that are opposite and have a sum of zero

400

What does this mean? |-6| = 6

The absolute value of -6 is 6, or -6 is 6 units from zero.

500

Subtracting a positive number is the same thing as...

Adding a negative 7-4 = 7 +-4

Adding Integers

100

-5 + 9

4

200

-12 + 5

-7

300

-16 + (-17)

-33

400

5+(-3)+6

8

500

-16+18+-17

-15

Subtracting Integers

100

-4 - 6

-4 + (-6) = -10

200

4 - 11

4 + (-11) = -7

300

15 - (-7)

15 + 7 = 22

400

-27 - (-3)

-27 + 3 = -24

500

-10 - 11 - (-3)

-10 + (-11) + (3)= -18

Word Problems

100

Jason dives 10 feet under water and swims back up 3 feet. Where is his current location in the water?

-10 + 3= -7

200

Chris gets paid $100, and then must pay his cable bill which is $245. How much money does he have?

100 - 245 = $-145

300

The temperature is now 76 degrees, it rose 12 degrees overnight. What temperature was it last night?

76-12 = 64 degrees

400

In a game, Jareek earned 15 points in the first round, in the 2nd round he lost 20 points for not showing sportmanship. In the final round he scored double what he did in the first round. What is his final score?

15 + (-20) + 30 = 25 points

500

Nikkia starts with $1000 in her bank account, she withdraws $750 to pay her rent. She lets a friend borrow $70, buys new clothes for $120. She finds $100 cash on the street, and deposits 1/4 of it. How much money is in her bank account?

$85

Mixed Review

100

Solve |3|.

The absolute value of |3| is 3.

200

What is the opposite of 7?

-7

300

What is the absolute value of -25?

25

400

What is the opposite of -13?

13

500

Solve |85|.

85