1. Adding & Subtracting Integers

2. What Is Needed to Begin?
A Number Line!

3. How the Signs Work + + = + + - = - - - = + - + = -
‘+’ Means turn right!
‘-’ Means turn left!
Signs that are right next to each other have to be changed into one sign!
+ + = = -
- - = = -
How the Signs Work

4. How to Use the Number Line
Are any signs right
next to each other?
If yes, change them
into one sign.
Place a dot on the number line where the first number would be.
Turn left or right based on the sign.
Move how many spaces the second number says.
Whichever number you land on is the answer. 3 + 1 = 4
Plus means
move right!
How to Use the Number Line

5. 3 - 2 = 1 Minus means move left! -5 -4 -3 -2 -1 0 1 2 3 4 5
Are any signs right
next to each other?
If yes, change them
into one sign.
Place a dot on the number line where the first number would be.
Turn left or right based on the sign.
Move how many spaces the second number says.
Whichever number you land on is the answer. 3 - 2 = 1
Minus means
move left!
Let’s Practice

6. -3 - 2 = -5 Minus means move left! -5 -4 -3 -2 -1 0 1 2 3 4 5
Are any signs right
next to each other?
If yes, change them
into one sign.
Place a dot on the number line where the first number would be.
Turn left or right based on the sign.
Move how many spaces the second number says.
Whichever number you land on is the answer. -3 - 2 = -5
Minus means
move left!
Let’s Practice

7. -3 + 6 = 3 Plus means move right! -5 -4 -3 -2 -1 0 1 2 3 4 5
Are any signs right
next to each other?
If yes, change them
into one sign.
Place a dot on the number line where the first number would be.
Turn left or right based on the sign.
Move how many spaces the second number says.
Whichever number you land on is the answer. -3 + 6 = 3
Plus means
move right!
Let’s Practice

8. Now Let’s Try Double Signs!

9. - 3 + - 6 = -3 + - = -, so change the two signs into one! Minus means
Are any signs right
next to each other?
If yes, change them
into one sign.
Place a dot on the number line where the first number would be.
Turn left or right based on the sign.
Move how many spaces the second number says.
Whichever number you land on is the answer. 3 + - 6 = -3
+ - = -, so change the two signs into one!
Minus means
move left!
Let’s Practice

10. - 5 + - 2 = 3 + - = -, so change the two signs into one! Minus means
Are any signs right
next to each other?
If yes, change them
into one sign.
Place a dot on the number line where the first number would be.
Turn left or right based on the sign.
Move how many spaces the second number says.
Whichever number you land on is the answer. 5 + - 2 = 3
+ - = -, so change the two signs into one!
Minus means
move left!
Let’s Practice