Adding and Subtracting Integers

Same Signs

100

-2 + -6 

-8

200

3 + 4

7

300

-7 + -2

-9

400

9 + 8 =

17

500

-10 + -3

-13

Different Signs

100

9 + (-5)

4

200

-12 + 5

-7

300

-16 + 17

1

400

20 + (-3)

17

500

16 + (-19)

-3

Keep - Keep - Change

100

-4 - 6

-10

200

4 - 11

-7

300

15 - (-7)

22

400

-27 - (-3)

-24

500

2 - 26

-24

Mixed

100

-2 - 3

-5

200

-10 + 30

20

300

21 - (+5)

16

400

62 + (-32)

30

500

-123 - (-24)

99

Rules

100

What do the letters BMS mean?

Bloomfield Middle School

200

What is the next holiday coming up? 

Valentine's Day

300

What is the rule, when adding, if the signs are the same?

Add and keep the sign

400

What is the rule, when adding integers. if the signs are different?

Subtract and keep the sign of the bigger number

500

What is the rule for Subtracting Integers?

Keep Change Change  

or

Keep the 1st integer

Change subtraction sign to addition

Change the 2nd integer to its opposite