Adding and Subtracting Integers

Subtracting Integers

Adding Integer Rules

• Same sign, add and keep

• Different signs subtract, keep the sign of the bigger number

• Then you will be exact

Another way

• same sign, find the sum and keep the sign

• different sign, find the difference and keep the bigger

Poll

What is an integer rule for adding

$$-4+\left(-5\right)?$$  

• Same sign add and keep

• Different sign subtract and keep the higher number

• Keep Change Change

Poll

What is an integer rule for adding

$$4+\left(-5\right)?$$  

• Same sign add and keep

• Different sign subtract; and keep the sign of the higher number

• Keep Change Change

Fill in the Blanks

The rule for ADDING integers with the same sign is: same sign, ________ and _______ the sign.

Multiple Choice

-9 + (-5)

• -14

• 14

• -4

Multiple Choice

-8 + 20

• -28

• 28

• 14

• 12

Multiple Choice

4+6

• 10

• 14

• 12

• 2

Subtracting Integers with Keep Change Change

• Keep the first integer

• Change the subtraction to addition

• Change the second integer to the opposite

Multiple Choice

(-9) - (+3)

• -12
• -6
• 6
• 12

Multiple Choice

-4 - 6 =

• -10

• 10

• 2

• -2

Multiple Choice

3 - 11 =

• -8

• 8

• 14

• -14