Exploring Array Strategies in Multiplication and Division

The video tutorial explains how to divide 48 chairs into three equal rows by decomposing the number 48 into smaller parts, 30 and 18, to simplify the division process. The teacher emphasizes understanding the role of the divisor, which represents the number of groups, and demonstrates how to find the number of chairs in each row. The tutorial highlights the importance of decomposing numbers to make division more manageable and reinforces the concept of division as finding either the number of groups or the size of each group.

How many chairs were initially arranged into rows?

• 16 chairs

• 18 chairs

• 30 chairs

• 48 chairs

Tags

CCSS.2.OA.C.4

Into how many rows were the chairs arranged?

• 3 rows

• 2 rows

• 4 rows

• 5 rows

Tags

CCSS.2.OA.A.1

What two numbers was 48 decomposed into?

• 25 and 23

• 35 and 13

• 30 and 18

• 20 and 28

Tags

CCSS.4.NBT.B.6

What is the result of dividing the decomposed number 30 by 3?

• 10 chairs

• 15 chairs

• 12 chairs

• 20 chairs

Tags

CCSS.4.NBT.B.6

What is the result of dividing the decomposed number 18 by 3?

• 10 chairs

• 4 chairs

• 6 chairs

• 8 chairs

Tags

CCSS.3.OA.A.2

What does the divisor 3 represent in this problem?

• Number of chairs

• Number of rows

• Size of each row

• Total chairs

Tags

CCSS.3.OA.A.2

Why was division used in this scenario?

• To add numbers

• To find the size of each group

• To subtract numbers

• To multiply numbers

Tags

CCSS.2.OA.C.4

What was the total number of chairs after decomposition and division?

• 16 chairs

• 48 chairs

• 30 chairs

• 18 chairs

Tags

CCSS.3.OA.B.5

How did the student verify the correctness of the decomposition?

• By adding the numbers

• By subtracting the numbers

• By dividing the numbers

• By multiplying the numbers

Tags

CCSS.3.OA.D.8

What mathematical concept was emphasized through the problem?

• Addition

• Subtraction

• Multiplication

• Division

Tags

CCSS.3.OA.D.8