Adding, Subtracting, Multiplying, Dividing Whole Numbers

(-40)÷4+11

• 1

• -21

• 21

• -1

-27 / -27

• 0

• -0

• 1

• -1

-7(10)=

• 70

• 700

• -70

• -700

-20/5=

• -4

• 4

• -100

• 100

Answer the following:

12 + (-3) =

• 15

• -15

• 9

• -9

What is the rule when adding integers? For example: 13 + (-1) =

• If the signs are the same, add and keep the sign. If the signs are different, subtract and keep the sign of the larger whole number.

• A negative times a negative equals a positive.

• Same, Change, Change

• A negative divided by a positive equals a negative.

What sign would your answer have if you multiply a negative by a negative?

For example: -9(-9) =

• Positive

• Negative

What would your answer by when you multiply two numbers with different signs? For example: -5(8) =

• Positive

• Negative

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

• True

• False

Which operations do the following rules work for: Signs of two numbers are different, answer is negative Signs of two numbers are the same, answer is positive

• Addition

• Subtraction

• Multiplication

• Division