Adding and Subtracting Integers

Vocab

100

Absolute Value

The distance of a number from zero

200

Integer

The set of whole numbers and their opposites.

300

Opposite

The opposite of a number is the same distance from zero as the original number just on the other side.

400

|-6|

Absolute value of -6 = 6

500

6 and -6

Additive Inverses

Adding Integers

100

-15 + 9

-6

200

-12 + -25

-37

300

16 + (-107)

-91

400

How do you find the sum of numbers with different signs

Subtract and take the sign of the number with the greater absolute value.

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

-12 - 23 

-35

200

-10 + 30

20

300

27 - 75

-48

400

Subtracting a negative is the same thing as...

Adding a positive

500

-10 + (-2) - 5

-17