How are adding integers and subtracting integers related?

1.2

SUBTRACTING INTEGERS

3 - 2 Both Positive

3 - 2 Both Positive

3 + (- 2) Compared to Adding

3 + (- 2) Compared to Adding

a number is the same as

the of that number

In Words…

HOW TO SUBTRACT INTEGERS USING A

NUMBER LINE:

-4 - 1

Using a Number Line

-4

-4 - 1

Using a Number Line

-4 -1

To an integer, change the sign

sign and make the integer

General Rule

ADDITIVE INVERSE PROPERTY:

+ =

-4 + 4 - 9

-4 + 4 - 9

-4

-4 + 4 - 9

-4 4

-4 + 4 - 9

-4 4

-9