Exploring Two Digit Multiplication with Arrays

The video tutorial explains how to use an array model for two-digit multiplication. It demonstrates dividing a large array into smaller, manageable arrays to simplify calculations. The tutorial also provides tools to aid student understanding, such as showing dimensions and tick marks. It concludes with advanced problem-solving techniques using the array model.

What is the main focus of the video tutorial?

• Two-digit multiplication using an array model

• Addition using an array model

• Division using an array model

• Single-digit multiplication

Tags

CCSS.4.NBT.B.5

How many rows and columns does the array representing 13x14 have?

• 13 rows and 14 columns

• 14 rows and 13 columns

• 14 rows and 14 columns

• 13 rows and 13 columns

Tags

CCSS.3.OA.A.1

What colors are used to divide the array into four smaller arrays?

• Yellow, Blue, Brown, Green

• Red, Blue, Green, Yellow

• Blue, Red, Brown, Yellow

• Yellow, Red, Brown, Green

Tags

CCSS.3.OA.A.1

What happens to the overall dimensions of the large array when the red point is dragged?

• They increase

• They remain the same

• They change

• They decrease

Tags

CCSS.4.NBT.B.5

What is the product of the smaller arrays 10x10, 10x4, 3x10, and 3x4?

• 100, 30, 40, 12

• 100, 40, 30, 12

• 100, 40, 12, 30

• 100, 30, 12, 40

Tags

CCSS.4.NBT.B.5

What is the final product of 13 and 14 when the smaller arrays' products are added together?

• 162

• 182

• 192

• 172

Tags

CCSS.3.OA.A.1

What feature can be used to make the problem easier for students starting out?

• Change the multiplication problem

• Show remaining dimensions

• Hide the grid

• Show tick marks

Tags

CCSS.4.NBT.B.5

What can be hidden as students get better at using the arrays?

• Tick marks

• Dimensions

• Grid

• Red point

Tags

CCSS.4.NBT.B.5

How can the multiplication problem be changed?

• By pressing show tick marks

• By dragging the red point in the upper right corner

• By hiding the grid

• By showing remaining dimensions

Tags

CCSS.4.NBT.B.5

What can be used to solve multiplication problems that extend beyond the screen limits?

• Array four with a variable grid size

• Array one with a larger grid size

• Array two with a smaller grid size

• Array three with a medium grid size

Tags

CCSS.4.NBT.B.5