Mastering Multiplying Decimals with Models

The video tutorial guides students through an activity to create models representing the multiplication of decimals by whole numbers using color tiles. Students learn to drag and stretch tiles to cover specific grid sections, forming groups to visualize the multiplication process. The tutorial emphasizes creating five groups of three-tenths each, adjusting tiles as needed. Once the model is complete, students fill in text boxes to express the multiplication as repeated addition. The final model shows one whole grid and five-tenths of another, illustrating the product of 5 times 3/10 as 1.5.

What is the purpose of using color tiles in this activity?

• To separate different sections of the grid

• To color the grid for aesthetic purposes

• To represent multiplication of decimals visually

• To count the number of tiles

Tags

CCSS.4.NBT.B.5

How many tenths does each color tile represent in the model?

• 2/10

• 5/10

• 1/10

• 3/10

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

What do you do if a group cannot be fully covered with one tile?

• Skip the group

• Use a different color tile

• Get another tile to complete the group

• Reduce the size of the tile

Tags

CCSS.4.NBT.B.5

How many groups of three tenths are created in the model?

• 5 groups

• 4 groups

• 3 groups

• 6 groups

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

What is the total shaded area represented in the model?

• 1 and 5/10

• 1 and 3/10

• 1 whole grid

• 1 and 2/10

Tags

CCSS.3.G.A.2

What mathematical operation does the model represent?

• Division

• Addition

• Subtraction

• Multiplication

Tags

CCSS.4.NBT.B.5

What is the product of 5 groups of 3/10 according to the model?

• 15/10

• 1 and 5/10

• 1

• 5/10

Tags

CCSS.4.NF.B.4A

CCSS.4.NF.B.4B