Adding and Subtracting Integers

Vocab

100

What is absolute value?

The distance of a number from zero (always positive)

200

What do you call a set of whole numbers and their opposites?

Integers

300

What are integers the same distance from zero as the original number just on the other side of zero?
Example: -3 and 3

Opposites

400

|-6|

Absolute value of -6 = 6

500

The absolute value of  -6 is <, >, or = to 3

>

6>3

Adding Integers Same Sign

100

-5 + -9

-14

When adding integers with the same sign, keep that sign for the sum.

200

-12 + -5

-17

300

-16 + (-17)

-33

400

6 plus the absolute value of -5

11

The absolute value of 5 is positive

500

-16+-17

-33

Adding Integers Different Sign

100

-4 - 6

-10

200

4 - 11

-7

300

15 - (-7)

22

2 negatives make a +

400

-27 - (-3)

-24

500

-10 - 11 - (-3)

-18

Mix

100

-2 - 3

-5

200

-10 + 30

20

300

21 - (-5)

26

400

Subtracting a negative is the same thing as...

Adding a positive

500

-10 + (-2) - 5

-17