Adding and Subtracting Decimals (Including Negatives)

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

-40 + 15.05=

• 55.05

• 24.95

• -24.95

• -14.65

• -25.95

Find -6.23 + 7.5

• 13.73

• 1.3

• -1.27

• 1.27

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

Find 6.23 - 7.5

• -13.73

• 1.3

• -1.27

• 1.27

When adding a NEGATIVE number and NEGATIVE number,  your result will be...

• Positive

• Negative

• The sign of the larger absolute value

• The sign of the smaller absolute value

7.9 - 3.47 =

• 11.37

• 4.43

• 3.32

• 4.37

7.05 - 4.6 =

• 2.45

• 3.65

• 11.65

• 11.45

94 - 4.8 =

• 89.2

• 5.4

• 90.80

• 98.8