Analyzing Arrays
Look at an array with 3 rows of 2 stars. What multiplication sentence describes this array?
3 × 2 = 6
If 3 × 2 = 6, what is the related math fact that shows the commutative property?
2 × 3 = 6
Amy has 12 pens. She gives 2 pens to each friend. How many friends get pens?
6 friends
A tape diagram has 4 equal boxes, and each box has a "2" inside. What is the total value?
8
Ms. Ramirez arranges all the math books into 6 equal groups of 4. How many math books does she have?
24 books
Rotate an array that shows 5 rows of 2 circles by 90 degrees. How many rows and columns does the new array have?
2 rows and 5 columns
Fill in the blank to make this sentence true: 7 × 2 = 2 × ___.
7
In the equation 15 ÷ 3 = 5, what is the mathematical name for the answer, "5"?
quotient
If a tape diagram shows a total of 15 broken into 3 equal units, what number goes inside each unit?
5
Mr. Myer’s class earns 3 points each time they answer a question correctly. The class earns 27 points. How many questions did they answer correctly?
9 questions
Draw an array that shows 8 rows of 2. Write a multiplication sentence and circle the factor representing the number of rows.
8 x 2= 18
Skip-count by 3s to find the total for 6 groups of 3.
3, 6, 9, 12, 15, 18
Fill in the blanks below to complete the related division sentence: 24 ÷ 4 = ___
6
Draw a tape diagram to model 18 ÷ 2 = 9 as a measurement problem (size of groups is 2). How many boxes do you draw?
9
There are 3 tricycles. Each tricycle has 3 wheels. How many wheels are there in total?
9 wheels
Use the distributive property to find the total: An array has 5 rows of 3 green grapes and 1 row of 3 red grapes. Write a combined multiplication sentence.
6 × 3 = 18?
(5 × 3) + (1 × 3) = 15 + 3 = 18
Explain what changes and what stays the same when you apply the commutative property to 4 × 2.
number of groups and group size change places, but the total product stays the same
If 18 ÷ 3 = 6, what does the unknown "6" represent if this is a measurement division problem where 3 is the size of each group?
number of groups
Draw a tape diagram to model 18 ÷ 2 = 9 as a partitive problem (number of groups is 2). How many boxes do you draw?
2
A baker packs 16 cupcakes into boxes of 2. She sells each box for $3. How much money does she make?
$24?
True or False: An array showing 3 × 4 has the exact same total and arrangement as an array showing 4 × 3.
False
Write a multiplication equation with a letter for the unknown to represent: "8 columns of 3 objects
Write a multiplication equation with a letter for the unknown to represent: "8 columns of 3 objects
If 21 ÷ 3 = 7, what does the unknown "7" represent if this is a partitive division (fair share) problem where 3 is the number of groups?
size of each group
Write both a multiplication sentence and a division sentence to match a tape diagram that shows 7 units of 3 totaling 21.
7 × 3 = 21 and 21 ÷ 3 = 7
Explain the steps of the RDW process used to solve Eureka Math word problems.
What is Read the problem, Draw a model/visual, and Write an equation and a statement?