Multiplication
Complete the equation.
4 x __ = 28
4 x 7 = 28
Complete the equation.
25 ÷ __ = 5
25 ÷ 5 = 5
I cut 3 bananas into 7 slices to put on my cereal. How many banana slices did I put on my cereal?
3 x 7 = 21
I put 21 banana slices on my cereal.
Write a multiplication sentence to match this array.
OOO
OOO
2 x 3 = 6
What is a product?
The product is the answer in a multiplication sentence.
Write a related multiplication equation and fill in the unknown number:
36 ÷ 9 = ___
9 x 4 = 36
4 x 9 = 36
Write a related division equation and fill in the unknown number:
8 x ___ = 40
40 ÷ 8 = 5
Ms. Wilhoite likes to eat pineapple on her pizza. She has 24 pineapple rings to put on 6 pizzas. How many pineapple rings does Ms. Wilhoite put on each pizza? Draw a picture and write a number sentence to solve.
24 ÷ 6 = 4
Array, equal groups, labeled tape diagram
The parking lot has 5 rows of 4 cars. Draw a picture and write an equation to solve.
5 x 4 = 20
Labeled tape diagram with 5 boxes and 4 in each box.
Array with 5 rows and 4 columns (or vice versa).
Equal groups with 5 groups and 4 in each group.
What is a factor?
The factors are the number of groups and the size of the groups in a multiplication problem or a division problem.
Explain the relationship between 3 x 6 = 18 and 6 x 3 = 18.
They are similar because the factors are flipped. It's the commutative property in action!
Write a related division equation for this number sentence:
21 ÷ __ = 3
7 x 3 = 21
Ms. Kelley's class played a game. Each time they answered a question correctly, they earned 3 points. The class earned 30 points playing the game. Ms. Kelley uses the method 3 x ___ = 30 to find how many questions the class answered correctly. Is her method correct? Why or why not?
Her method is correct because the missing factor represents the number of questions (number of groups) that the class answered correctly.
Draw a strip diagram to match this array:
OOOOOOOOOO
OOOOOOOOOO
OOOOOOOOOO
3 boxes with 10 in each box
OR
10 boxes with 3 in each box
What is a quotient?
The quotient is the answer to a division problem.
Draw a tape diagram with 8 boxes and 4 circles in each box. Write a multiplication equation to match.
8 x 4 = 32
Draw a tape diagram with 5 boxes and 6 circles in each box.
Then, write a division sentence to match. Label the factors.
30 ÷ 5 = 6
number of groups = 5
size of groups = 6
6 x 8 = 48
Factors:
6 --> number of groups
8 --> size of groups
Draw a strip diagram to solve this problem, and then draw an array to match.
6 x 8 = ___
OOOOOOOO
OOOOOOOO
OOOOOOOO
OOOOOOOO
OOOOOOOO
OOOOOOOO
6 boxes with 8 in each box, or 8 boxes with 6 in each box.
What is the break apart strategy?
The break apart strategy allows us to take apart an array so that we can multiply smaller numbers, and then add it together.
What are all the factors for the number 12? (How many ways can you use multiplication to make 12?)
1 x 12
2 x 6
3 x 4
I have 40 buttons. I need to put buttons on 4 sweaters. How many buttons to do I put on each sweater?
Draw a picture and write a number sentence to solve.
40 ÷ 4 = 10
Miss Therrien used 18 bananas to make banana bread. She made 6 loaves of bread. How many bananas did she use to to make 2 loaves of bread?
Miss Therrien used 6 bananas to make 2 loaves of bread.
Use the break apart strategy to find the total.
OOOOOO
OOOOOO
OOOOOO
OOOOOO
-------
XXXXXX
XXXXXX
4 x 6 = 24
2 x 6 = 12
6 x 6 = (4 x 6) + (2 x 6)
6 x 6 = 24 + 12
6 x 6 = 36
What is the commutative property?
The commutative property allows factors to switch around in a multiplication problem.