Adding Integers

Adding integers with the same sign:

• Subtract

• Add and keep the sign.

• Add and that is it.

• What is adding integers?

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!

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

3 + (-63) =

• -60

• 60

• 66

• -66

(-23) + 11 =

• -12

• 12

• -34

• 34

(-20) + 41 =

• 21

• -21

• 51

• -51

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

Which expression matches the model?

-2 + 4 

• -2

• 2

• 0

• -4