Add and Subtract Integers with Negatives

Adding integers with different signs

• Subtract and keep the sign of the LARGER number.

• Subtract and keep the number of the smaller signs.

• Adding integers is hard!

• Subtract and do not change the signs!

The Cowboys lost 20 yards on the first play. On the second play, they gained 17 yards. Write an addition expression

• 20 + (-17)

• -20 + -17

• 20 + 17

• -20 + 17

What integer addition equation is being modeled?

• -5 + -3 = -2

• -5 + 2 = -3

• -5 + 3 = -2

• 5 + 3 = 8

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

(-8) + (-23) =

• -31

• 31

• 15

• -15

(-43) + (-44)

• -87

• 87

• 1

• -1

Solve the problem.
-2 + (-5)

• 7

• -7

• -3

• 3

-4-5

• -1

• -9

• 9

• 1

-4 + (-3) = ?

• 7

• 1

• -1

• -7

35 - (-35) 

• 0

• -70

• 70

• 1