Adding and Subtracting Integers with a Number Line

Which pair of integers are additive integers (opposites)? Select all that apply.

• -8 and -8

• -256 and 256

• 15 and 1.5

• 26 and -26

• -9 and 9

When adding 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

When adding with different signs you....

• subtract and take the sign of the one you have more of

• add the opposite

• add and keep the sign

• subtract and keep the sign

Use the model to solve the equation.

• 1

• 9

• -1

• -9

-7 - 2

• -9

• 9

• 5

• -5

How do you know that 5 and -5 are additive inverses (opposites)?

• Because they both have a 5

• They are the same distance from 0 and on opposite sides of 0

• Because they are the same

• They both are on a number line

What can be added to these counters to make zero?

• One red counter

• Two yellow counters

• Two yellow counters and one red counter

• Two red counters

Which equation is represented by the model below?

• -5 + 3 = -2

• 5 + (-3) = 2

• 5 + 3 = 8

• -5 + (-3) = -8

What expression does the model show?
Red = +
Yellow = -

• -7 + 4

• 7 + (-4)

• 7 + 4

• -3 + 0

To ADD, move to the _________ on the number line.

• right

• left

• zero

• up