for our bbes 3 rd graders multiplication properties

FOR OUR BBES 3RD GRADERS

MULTIPLICATION PROPERTIES

COMMUTATIVE PROPERTY

Looks like…

a X b = b X a

The order of the numbers doesn’t change the answer to

the problem!


a X b = b X aHow can I remember this?

“Commutative” sounds like “communicate.”

The a is COMMUNICATING (talking) with the b and then the b is

COMMUNICATING (talking) back to the a.


What goes in the blank?

5 X 2 = 2 X ___



5 X 2 = 2 X 5



7 X 8 = ___ X 7



7 X 8 = 8 X 7

ASSOCIATIVE PROPERTY

Looks like…

(a X b) x c = a X (b x c)

The grouping of the factors doesn’t change the answer!


(a X b) x c = a X (b x c)How can I remember this?

If you associate with someone, you are hanging out. So the a,

b, and c all hang out or “associate” with each other but sometimes in different groups.

(There is still only ONE a, b, and c hanging out! Just like there is only

one Johnny, Freddie, and Bob!)



(2 X 3) x 7 = __ X (3 x 7)



(2 X 3) x 7 = 2 X (3 x 7)



(5 X 4) x 8 = 5 X (__ x 8)



(5 X 4) x 8 = 5 X ( 4 x 8)

DISTRIBUTIVE PROPERTY

Looks like…

a x (b + c) = (a x b) + (a x c)

Multiplying the sum or difference by a number is the same as multiplying each number in the sum or difference by the number and adding or subtracting the

product!


a x (b + c) = (a x b) + (a x c)

How can I remember this?

If you distribute something,

you hand it out. With this property, the first

number is being distributed to the other numbers!



9 X (20 - 3) = (9 X ___) – (9 X 3)



9 X (20 - 3) = (9 X 20) – (9 X 3)



5 X (2 + 7) = (5 X 2) + (___ X 7)



5 X (2 + 7) = (5 X 2) + (5 X 7)

BONUS INFORMATION!


IDENTITY PROPERTY

Looks like…

a X 1 = a

Any number multiplied by 1 will give you the original

number!

IDENTITY PROPERTY

a X 1 = a


A person has ONE identity which defines them.

So any number multiplied by ONE would show the identity

property!

IDENTITY PROPERTY


8 x 1 = ____

IDENTITY PROPERTY


8 x 1 = 8

IDENTITY PROPERTY


___ x 1 = 45

IDENTITY PROPERTY


45 x 1 = 45

ZERO PROPERTY

Looks like…

a X 0 = 0

When any number is multiplied with zero, the answer is zero!

ZERO PROPERTY

a X 0 = 0


Well… I hope this is as obvious to you as it is to me.

Any number multiplied by ZERO

equals ZERO in the ZERO property!

ZERO PROPERTY


5 x 0 = ____

ZERO PROPERTY


5 x 0 = 0

ZERO PROPERTY


2,346 x ____ = 0

ZERO PROPERTY


2,346 x 0 = 0

CHALLENGE ROUND!



Name the property that is being shown

in each of the following slides.

NAME THE PROPERTY THAT IS BEING SHOWN BELOW.

72 x 0 = 0Commutative PropertyAssociative Property

Identity PropertyZero Property

Distributive Property


(2 X 6) x 7 = 2 X (6 x 7)

Commutative PropertyAssociative Property




9 x 4 = 4 x 9Commutative PropertyAssociative Property




9 x 4 = 4 x 9Commutative Property

Associative PropertyIdentity Property

Zero PropertyDistributive Property


1 x 6 = 6Commutative PropertyAssociative PropertyIdentity Property



2 X (5 - 1) = (2 X 5) – (2 X 1)





(7 X 5) x 3 = 7 X (5 x 3)





8 X (3 + 6) = (8 X 3) + (8 X 6)





25 x 1 = 25Commutative PropertyAssociative PropertyIdentity Property



9 X (6 - 5) = (9 X 6) – (9 X 5)





(1 X 7) x 4 = 1 X (7 x 4)




YOU ROCK.

GREAT JOB!

for our bbes 3 rd graders multiplication properties

Documents