Adding and Subtracting Integers

Vocab

100

Negative Integer 

A whole number LESS than zero 

200

Integer

The set of whole numbers and their opposites.

300

Inverse

Opposite / Reverse 

400

Inverse Operation 

Inverse operations are opposite operations. They are the operation that reverses the effect of another operation. For example, addition is the inverse operation of subtraction and multiplication is the inverse operation of division .

500

Positive integers 

 a whole number greater than zero

Adding Integers

100

-5 + 9

4

200

-12 + 5

-7

300

-16 + (-17)

-33

400

How do you find the sum of numbers with different signs

Subtract and take the sign of the bigger number

500

-16+18+-17

-15

Subtracting Integers

100

-4 - 6

-10

200

4 - 11

-7

300

15 - (-7)

22

400

-27 - (-3)

-24

500

-10 - 11 - (-3)

-18

Mix

100

-2 - 3

-5

200

-10 + 30

20

300

21 - (+5)

16

400

Subtracting a negative is the same thing as...

Adding a positive

500

-10 + (-2) - 5

-17