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Adding Integers
Subtracting Integers
Add or Subtract
Add or Subtract
Real Life
100
8+(-15)=
What is -7
100
9-(-5)=
What is 14
100

-12 + -11 =

-23

100

A positive added to a positive is ____________.

a) positive 

b) negative 

c) sometimes positive

d) sometimes negative

a) positive

100

You have $30 and you mow the grass to earn $30.  Write an equation for this.

30 + 30 = 60

200
-9+21=
What is 12
200
-7-4=
What is -11
200

8 + -4 =

4

200

- 15 + 5 = 

-10

200

You have $20 and buy your lunch for $12.  Write the equation showing how much money you have.

20 - 12 = 8

300
14+(-9)+(-20)=
What is -15
300
Write as addition: -7-10=
What is -7+(-10)
300

60 - (-10) = 

70

300

-200 - 50 = 

-250

300

You get $15 from your friend for your birthday and you buy a hamburger for $6.  Write an equation showing how much money you have.

15 - 6 = 9

400
How do you add two same signed integers?
What is "add 'em & keep the sign"
400
Write as addition: 12-(-19)
What is 12+(+19)
400

A negative added to a negative is ____________.

a) positive 

b) negative 

c) sometimes positive

d) sometimes negative

b) negative

400

You want to buy some new shoes for $25.  What integer would represent this?

-25

400

You and 3 friends want to go to a movie.  The tickets are $12 each.  Write the equation to show this situation.

4(-12) = -48

500
How do you add different signed integers?
What is "remember to subtract and keep the sign of the larger one"
500
Complete the statement: Subtraction is ....
What is "addition of the opposite"
500

A negative added to a positive is _____________.

a) Always positive

b) Always negative

c) Sometimes negative 

d) sometimes positive


Student should give an example of the correct answer.

c and d

Sometimes positive and sometimes negative


500

You work for 3 hours and your dad pays you $8 for each hour.  What integer represents this?

+24

500

There are 20 students in the class and 4 of them are absent because they are sick. Write the equation showing how many students are in class today.

20 - 4 = 16