Arrays and Multiplication
Write the multiplication equation that matches this array:
x x x
x x x
x x x
3 x 3 = 9
14 flowers are divided into 2 equal groups. How many flowers are in each group?
There are 7 flowers in each group.
a. Draw an array that shows 6 rows of two.
b. Write a multiplication sentence where the first factor represents the number of rows.
6 x 2 = 12
What does RDW stand for?
Read, Draw, Write
Draw a picture to show 4 x 2 = 8.
x x x x
x x x x or
x x
x x
x x
x x
Audrina has 24 colored pencils. She puts them in 4 equal groups. How many colored pencils are in each group?
There are 6 colored pencils in each group.
24/4 = 6
x x x x x x
x x x x x x
x x x x x x
x x x x x x
a. Draw an array that shows 3 rows of 4.
b. Write a multiplication sentence that matches the array. The first factor should represent the number of rows.
3 x 4 = 12
When do you need to write a complete sentence that includes your answer for a problem?
Whenever your problem has a question mark in it!
Example: Mrs. Gardner had 3 packs of 7 pencils. How many pencils did Mrs. Gardner have?
x x x x x x x 3 x 7 = 21
x x x x x x x Mrs. Gardner has 21 pencils.
x x x x x x x
Write a repeated addition AND multiplication sentence to represent this array:
x x x x
x x x x
x x x x
4 + 4 + 4 = 12 and 3 x 4 = 12
21 triangles are divided into 3 equal groups. How many triangles are in each group?
There are 7 triangles in each group.
Sarah went to the beach. She arranged 40 shells into rows of 4. Draw her array. .
x x x x (10 rows of 4)
x x x x
x x x x
x x x x
x x x x
x x x x
x x x x
x x x x
x x x x
x x x x
Sarah buys bottles of soap. Each bottle costs $2. How much money does Sarah spend if she buys 3 bottles of soap?
[$2] [$2] [$2]
3 x 2 = 6
Sarah spends $6 dollars.
Draw an array with 5 rows of 3.
x x x
x x x
x x x
x x x
x x x
Divide twelve shells into groups of 3. Write a division equation to represent the picture.
12 / 3 = 4
Jada gets 2 new packs of erasers. Each pack has 6 erasers in it.
a. Draw an array to show how many erasers Jada has altogether.
b. Write and solve a multiplication sentence to describe the array.
c. Use the commutative property to write and solve a different multiplication sentence for the array.
Array: 2 rows of 6.
Multiplication: 2 x 6 = 12 and 6 x 2 = 12
Mary Beth organizes stickers on a page in her sticker book. She arranges them in 3 rows and 4 columns. How many stickers does Mary Beth have?
x x x x 3 x 4 = 12
x x x x Mary Beth has 12 stickers.
x x x x
Robbie sees that a carton of eggs shows an array with 2 rows of 6 eggs. What is the total number of eggs in the carton? (use the RDW process)
x x x x x x
x x x x x x 2 x 6 = 12 There are 12 eggs in the carton.
Stacey has 18 bracelets. After she organizes the bracelets by color, she has 3 equal groups. How many bracelets are in each group?
There are 6 bracelets in each group.
Issac picks 3 tangerines from his tree every day for 7 days.
a. use circles to dray an array that represents the tangerines Isaac picks.
b. How many tangerines does Isaac pick in 7 days? Include a multiplication sentence.
c. Isaac decides to pick 3 tangerines every day for 3 more days. Draw x's to show the new tangerines on the array in Part (a).
d. Write and solve a multiplication sentence to find the total number of tangerines Isaac picks.
Array: 7 rows of 3
Sentence: Isaac picks 21 tangerines in 7 days. 7 x 3 = 21 or 3 x 7 = 21
Last Multiplication: 10 x 3 = 30
Ivania recycles. She gets 3 cents for every can she recycles. How much money does Ivania make if she recycles 6 cans?
[3] [3] [3] [3] [3] [3]
3 x 6 = 18
Ivania makes 18 cents.