Properties
o f
M ultiplication
–
G rades
3
a nd
4
( Standard
3 AF1.5
&
4 AF1.0)
Preparation:
P lace
f ive
p oster
s heets
w ith
e ach
p roperty
a nd
a n
e xample
o f
t he
property
i n
d ifferent
a reas
o f
t he
c lassroom.
( Posters
i ncluded
i f
n eeded)
Commutative
P roperty
Associative
P roperty
o f
of
M ultiplication:
Multiplication:
When
m ultiplying,
t he
The
w ay
i n
w hich
t he
order
o f
t he
f actors
d oes
factors
a re
g rouped
d oes
not
c hange
t he
p roduct.
not
c hange
t he
p roduct.
4 ! 2 = 8
(2 ! 3) ! 5 = 30
2 ! 4 = 8
2 ! (3 ! 5) = 30
Identity
P roperty
o f
Zero
P roperty
o f
Multiplication:
Multiplication:
When
a ny
n umber
i s
When
a ny
n umber
i s
multiplied
b y
1 ,
t he
multiplied
b y
0 ,
t he
product
i s
t hat
n umber.
product
i s
0 .
6 ! 1 = 6
8 ! 0 = 0
Distributive
P roperty
o f
Multiplication:
One
f actor
i n
a
multiplication
p roblem
can
b e
b roken
a part
t o
find
p artial
p roducts.
H e
sum
o f
t he
p artial
products
i s
t he
p roduct
of
t he
t wo
f actors.
6 ! 7 = (6 ! 5) + (6 ! 2)
1
MCC@WCCUSD (SBCMI) 10/15/11