Multiplication with Arrays

What is an array?

• A set that shows equal groups using rows and columns

• A set that shows unequal groups using rows and columns

• A set that shows equal groups using only rows

• A set that shows equal groups using only columns

Tags

CCSS.3.OA.A.1

CCSS.3.OA.A.3

Describe this array

__of rows

__of columns

or

__ of rows with __in each row

• 5 rows

  6 columns

  or

  5 rows with 6 in each row

• 8 rows

  5 columns

  or

  8 rows with 5 in each row

• 6 rows

  7 columns

  or

  6 rows with 7 in each row

• 5 rows

  8 columns

  or

  5 rows with 8 in each row

Tags

CCSS.3.OA.A.1

CCSS.3.OA.A.3

Which of the following is an example of an array in real life?

• 
• 
• 
• 

Tags

CCSS.3.OA.A.1

CCSS.3.OA.A.3

What multiplication fact does this array represent?

• 4 x 4 = 16

• 5 x 4 = 20

• 5 x 5 =25

• 4 x 5 = 20

Tags

CCSS.3.MD.C.7

CCSS.3.OA.A.1

CCSS.3.OA.A.3

What multiplication fact does this array represent?

• 4 x 4 = 16

• 3 x 4 = 12

• 3 x 3 = 9

• 3 x 5 = 15

Tags

CCSS.3.OA.A.1

CCSS.3.OA.A.3

CCSS.3.OA.C.7

How can we represent the multiplication sentence '4 x 2 = 8' using an array?

• 
• 
• 
• 

Tags

CCSS.3.OA.A.1

CCSS.3.OA.A.3

What array represents this multiplication fact, 5 x 5 = 25?

• 
• 
• 
• 

Tags

CCSS.3.OA.A.1

CCSS.3.OA.A.3

What multiplication sentence should Billy write for this array?

• 4 x 5 = 20

• 3 x 4 = 12

• 4 x 4 = 16

• 4 x 6 = 24

Tags

CCSS.3.OA.A.1

CCSS.3.OA.A.3

CCSS.3.OA.C.7

Select the equation that matches the array.

• 3 + 3 = 6
• 9 + 0 = 9
• 3 x 9 = 27
• 3 x 3 = 9

Tags

CCSS.3.OA.A.3

Mr. Lopez planted 8 rows of apple trees on his farm. He planted 5 trees in each row. How many trees did Mr. Lopez plant?

• 13

• 45

• 40

• 25

Tags

CCSS.3.OA.A.1

CCSS.3.OA.A.3

CCSS.3.OA.C.7