Adding Integers

Adding Integers - Same Signs

​Add the digits -- Keep the sign

4 + 17 =

​-10 + -7 = ​

​Adding Integers - Same Signs

​Add the digits -- Keep the sign

​4 + 17 = 21

-10 + -7 = -17​

Match

Match the following

• -2 + -3 =

• 6 + 19 =

• -7 + -2 =

• 5 + 14 =

• -9 + -9 =

-5

25

-9

19

-18

• -5

• 25

• -9

• 19

• -18

​Adding Integers - Different Signs

Find the difference between the digits - larger digit determines the sign of the answer

-4 + 7 ​

Adding Integers - Different Signs

​Difference between Digits - Larger Digit Sign

-4 + 7​

Difference between digits (7-4=3)

Larger digit determines sign => +3​

Adding Integers - Different Signs

​​Difference between Digits - Larger Digit Sign

-19 + 10​ =

Adding Integers - Different Signs

Difference between Digits - Larger Digit Sign

​-19 + 10

Difference between digits (19-10=9)

Larger digit determines sign => -9​

Multiple Choice

-9 + 4 =

• 5

• -5

• 13

• -13

Multiple Choice

-99 + 100 =

• 199

• -199

• 1

• -1