Adding and Subtracting 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!

Tags

CCSS.7.NS.A.1C

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

Tags

CCSS.7.NS.A.1C

When you add opposites, what do you get?

• Zero

• A negative number

• It depends on which number has a larger absolute value.

• You cannot add opposites

Tags

CCSS.7.NS.A.1B

Which expression matches the model?

Tags

CCSS.7.NS.A.1C

35 - (-35) 

• 0

• -70

• 70

• 1

Tags

CCSS.7.NS.A.1C

Solve the problem.
-2 + (-5)

• 7

• -7

• -3

• 3

Tags

CCSS.7.NS.A.1B

38 - (-47) + (-8)

• -93

• 77

• 85

• 93

Tags

CCSS.7.NS.A.1C

-50 + -38 - (-91)=

• $179

• $3

• -$3

• -$79

Tags

CCSS.7.NS.A.1C

Adding integers with the same sign:

• Subtract

• Add and keep the sign.

• Add and that is it.

• What is adding integers?

Tags

CCSS.7.NS.A.1C

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

Tags

CCSS.7.NS.A.1C