Adding and Subtracting Decimals with Negatives

When adding decimals with different signs you....

• subtract and take the sign of the larger number

• add the opposite

• add and keep the sign

• subtract and keep the sign

Rewrite the problem as addition.

-5.66 - (-4.1)

• 5.66 + (-4.1)

• -5.66 + 4.1

• -5.66 + (-4.1)

• -5.66 - 4.1

What is the value of 18 - 23.2 ?

• -5.2

• -5.8 

• 5.2

• 5.8

When adding decimals with the same sign you.....

• subtract and take the sign of the larger number

• add the opposite

• add and keep the sign

• subtract and keep the sign

-2.5 + (-2.5)

• -5

• 0

• 5

7.6 - -6.5

• -11.8

• 1.1

• -16.3

• 14.1

• 21.195

• 17.185

• -21.195

• -17.185

-5.7 + 0.9

• 2.1

• -4.8

• -8.3

• -10.7

−7.34 − (−5.51)

• 1.53

• -1.83

• -12.85

• 2.83

- 2.09 - 15.271

• -17.361

• 13.181

• 17.361

• -13.181