Lisa IovinoMultiplying and Dividing Integers Ms. Iovino.

Lisa Iovino Multiplying and Dividing Integers

Multiplying and Dividing Integers

Ms. Iovino


To Multiply and Divide Integers,We use the same set of rules.

Meet the Negative Family


The negative people live in negativeland. In negativeland,

you must follow the rules that are listed here.

Rules to NegativeLand

• There are only two things that you can do in negativeland (Shop or Math)

• You can only go shopping in negativeland, if you have ONE other friend to go with.

• If you don’t go shopping you stay home and do math (meaning you are in the answer).


Let’s try a problem…..

4 x –2=


Multiply, like you would without the negative sign.

4 x 2=8How many negative signs do you

see?


One negative sign……

4 x –2=

One negative sign represents one negativeland resident.

Does he have anyone to shop with?


Nope, He doesn’t…..

So he stays home in the answer.

4 x –2= -8

Try these problems…..

• -5 x –3=

• -8 x 3=

• 10/-2=

• -14/-2=

• -20/5=

• -3 x –4 x –1=

Here are the answers…..

• -5 x –3= 15 The two negative people go shopping.

• -8 x 3= -24 One negative sign makes a negative answer.

• 10/-2= -5 One negative sign, negative answer.• -14/-2= 7 Two negative signs cancel out.• -20/5= -4 One negative sign, negative answer.• -3 x -4 x-1= -12 Two negative signs cancel out

and one is left in the answer.


In conclusion, when multiplying and dividing integers, every two negative signs cancel each other

out.


If you have an even number of negative signs, your answer is

negative.


If you have an odd number of negative signs, your answer is

positive.

Lisa IovinoMultiplying and Dividing Integers Ms. Iovino.

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