Adding Integers with Different Signs

33 + (-38)

• -5

• 5

• 71

• -71

-80 + 20

• 60

• 100

• -100

• -60

Find the sum:

10 + (-18) =

Adding integers with different signs

• Subtract and keep the sign of the BIGGER number!

• Subtract and keep the number of the smaller signs.

• Adding integers is hard!

• Subtract and do not change the signs!

-7 + -4

• -11

• -3

• 3

• 11

What integer addition equation is being modeled?

• -5 + -3 = -2

• -5 + 2 = -3

• -5 + 3 = -2

• 5 + 3 = 8

Two numbers that opposites that are added together to have sum of zero are called

• absolute value

• terminating decimal

• additive inverse

• repeating decimal

The temperature was 98 degrees last Friday. Wednesday it was 24 degrees cooler. Which expression represents the relationship in the temperature between Friday and Wednesday?

• (-98) + (-24)

• -98 + - 24

• 98 + 24

• 98 + (-24)

7 + (−8)