Definitions
What is a collection of objects arranged in equal rows and columns?
An array
Which way does rows go?
Which way does columns go?
Rows go side to side, and columns go up and down.
What property is this?
5 x 3 = 3 x 5
Commutative Property
Tyrone uses 3 markers to measure the length of a rope. Each marker is 5 inches long. Write a multiplication equation to model the problem.
____ x ____ = _______
3 x 5 = 15
Zeke has 4 flower plots. He sees 3 flowers in each flowerpot. How many flowers does Zeke see in the flowerpots.
A. 3
B. 7
C. 12
D. 15
C. 12 flowers
What is the commutative property of multiplication?
No matter how you switch/arrange the numbers, it will still multiply to equal the same product.
Draw an array for the equation 3 x 6.
* * * * * *
* * * * * *
* * * * * *
Write a related multiplication equation for this addition equation.
2 + 2 + 2 + 2 = 8
____ x ____ = ____
4 x 2 = 8
Tyrone uses 3 markers to measure the length of a rope. Each marker is 5 inches long. How many inches long is the rope?
15 inches
Edward has 8 bags of shells. There are 10 shells in each bag. How many shells does Edward have?
80 shells
True or False: product is the numbers multiplied to get a multiplication answer.
False. Factors are the numbers multiplied to get a multiplication answer. Product is the answer to a multiplication equation.
True or False:
* * * * *
* * * * *
The equation to represent this array is 2 x 3
False, the equation to represent the array is 2 x 5.
Write a related multiplication equation for this addition equation.
4 + 4 + 4 + 4 + 4 = 20
___ x _____ = ____
5 x 4 = 20
Kayla puts her pencils in 3 rows. She puts 3 pencils in each row. Write a multiplication equation Kayla can use to find the total number of pencils.
____ x ____ = ______
3 x 3 = 9
Ms. Knowles has 6 kittens. Each kitten has 2 toys. Which equation shows how many toys the kittens have?
A. 6+2= 8
B. 6 x 2= 8
C. 6 x 6= 12
D. 6 x 2= 12
D. 6 x 2 = 12
What are groups?
What numbers in a multiplication are the rows and the columns?
The first number is the rows, and the second number is the columns.
What is the unknown number in this equation?
8 x 7 = ____ x 8
7
Part A:
Hector reads 2 books each for 3 weeks. Write a multiplication equation to find the number of books Hector reads.
_____ x _____ = ______
3 x 2 = 6
Nell has 3 ribbons. Each ribbon is 9 inches long. Select the correct button in the table to show if the equation will equal the total length of the ribbon.
Yes or No:
3 x 3 =
3 x 9 =
3 + 3 + 3 =
9 + 9 + 9 =
3 x 3 = No
3 x 9 = Yes
3 + 3 + 3 = No
9 + 9 + 9 = Yes
In the equation 4 x 6 = 24
label the factors and product.
4 x 6 = 24
f f p
What equations does this array show?
* * * *
* * * *
Select ALL the correct answers.
A. 2 x 4 = 6
B. 4 x 2 = 8
C. 6 = 4 x 2
D. 8 = 2 x 4
E. 4 x 4 = 16
B. 4 x 2 = 8
D. 8 = 2 x 4
Complete the equation. Enter the correct answers in the boxes.
7 + 7 + 7 = _____ x ______
3 x 7
Part B:
Hector reads 2 books each for 3 weeks.
How many books does Hector read?
6 books
Evan has 3 bowls. He puts 5 crackers in each bowl. How can Evan find how many crackers are in each bowl? Select ALL the correct answers.
A. 3 + 5
B. 3 x 5
C. 5 x 5 x 5
D. 5 + 5 + 5
E. 3 + 3 + 3 + 3
B. 3 x 5
D. 5 + 5 + 5