Adding and Subtracting Positive and Negative Whole Numbers

Solve: -5 + (-10) =

• 5

• -15

• -5

• 15

The temperature was -5 degrees Fahrenheit in the morning, but by lunch time the temperature had increased 15 degrees.

Which of the equations below would you use to find the temperature at lunch time?

• -5 - 15 =

• -5(15) =

• -5 + 15 =

• 15/-5 =

Solve: 8 - 10 =

• 2

• 18

• -2

• -18

Re-write the equation below to show what it would look like after applying the rule for subtracting integers (Same, Change, Change):

-10 - 5

True or False: The answer to the equation -10(-5) is positive.

• True

• False

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

What is additive inverse?

• Distance from zero on the number line

• adding any two numbers

• the opposite of adding

• number added to its opposite to total zero

What is an integer?

• a positive or negative whole number

• fractions, decimals and percents

• fractions and decimals, but not whole numbers

• number added to its opposite to total zero

-3 - 11

• 8

• -14

• 14

• -8