Properties!
5 x ( 3 x 1 ) = ( 5 x 3 ) x 1
Associative Property
Finish the Product
10 x 7 = ____
100 x 70 = ______
70
700
8 8
x 5 1
________
4500
6 0 1 1
x 8
________
48,088
What does the identity property of multiplication say ?
the product of a 1 and a number is the same as that number
10 x 80 = ______
10^2 x 80 = ______
800
8000
2. 2 5
x 7
____________
14
2 3 , 0 1 6
x 5
___________
115 , 080
6 x ( 2 + 5 ) = (6 x 2 ) + (6 x 5 )
Distributive Property
Multiply
70
x 40
_______
2,800
2 2 x 3 8
800
2 x 5 2 0 9
1 0 , 4 1 8
What does the zero property of multiplication mean ?
The product of zero and a number is zero
50,000 X 60
3,000,000
25 + 31 + 32 + 31 + 28 + 34 + 31 + 29 + 29
270
4 x 2 0 , 8 5 9
8 3 , 4 3 6
In New York , Hayley and Kelly visit the same number of musesums. Hayley visits 2 museums during each of her 3 days there. If Kelly visits 3 museums a day , how many days is her trip ? What property could you use to solve.
3 x 2 = 2 x 3
Communitive Property
60 times a multiple of 2
sample answer 60 x 4
Write 4 addends with a estimated sum of 240 using clustering
sample answer
58 + 62 + 59 + 63
Suppose you multiply by a one digit number that is not zero. Will there always be the same number of zeros in the product as there are in the multiplicand ? Use an example to justify your answer.
No , sample explanation : 425 x 4 = 1700 has two zeros