Associative property
Show 3 x 4 x 5 using associative property
(3 x 4) x 5 or
3 x (4 x 5)
Show the array of 5*6
5 down 6 across
1 x 8 = ?
8
What Key words can tell us we are working on a division or multiplication word problem?
Each, Equal groups
Where does the total go during multiplication?
The end of the problem.
Solve (2 x 4) x 5
8 x 5
40
What is the array of 7*2 using communitive property
2 down 7 across
4826 x 0 = ?
0
What three things do we look for in a division or multiplication story problem?
Total
Groups/Factor 1
Amount in Each/Factor 2
Where does the total go for a division problem?
Beginning of the problem
Place to () to make the equation true. 3 x 3 x 5 = 45
(3 x 3) x 5 = 45
9 x 5 = 45
Answer the communitive property of 5 x 4 using an array
4 x 5=20
True or False?
1 x 0=1
False
1 x 0=0
MAS has 100 balloons for the 3rd graders. There are 4 3rd grade classes. How many balloons does each class get? -FIND THE VARIABLES-
Total 100 balloons
Groups 4 classes
Unknown/Big Question Amount in Each
Show a multiplication for 24÷8=3
3*8=24 or 8*3=24
Answer with two or more groupings 2x 5x 4
Answer is 40 groupings can be (2x5)x4 or 2x(5x4) or (2x4)x5 rearranged
Solve both the given and communitive property of 10*6
10*6=60
6*10=60
What is the zero property?
Any factor multiplied by zero will equal zero
A teacher arranged her classroom into 5 equal groups. Each group has 4 students. How many students are in the class? -WRITE AN EQUATION-
5*4=?
4*5=?
Solve and show as a division problem.
5 x 3
15÷3=5
15÷5=3
What does the associative property state
Order of digits/groups in 3 or more digit problems does not change product
What does the communitive property state?
The order of two factors does not change the product.
Anything times 1 will always be____?
Itself. We call this the Identity Property
Solve and Label
A class won cleanest room and received a pizza party! The principal brought in 36 slices of pizza. There are 12 students in the class. How many slices does each student get?
36÷12=3. Each student gets 3 slices.
Finish the fact family
8 x 4=32
32÷8=4
32÷4=8
4 x 8=32