Exploring Partial Products in Multiplication

Mr. Wassman introduces a new approach to large digit multiplication called partial products. He explains how to calculate the area of a sidewalk using partitioning rectangles and demonstrates the partial products method. The video includes example problems, such as planting marigolds along a highway, and compares partitioning rectangles with partial products. Students are encouraged to practice the new method and seek help if needed.

What is the formula for calculating the area of a rectangle?

• Length / Width

• Length - Width

• Length x Width

• Length + Width

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

How do you represent the number 660 in partitioning rectangles?

• 600 + 60 + 6

• 60 + 6 + 0

• 600 + 6 + 0

• 600 + 60 + 0

Tags

CCSS.2.NBT.A.3

What is the first step in solving a multiplication problem using partitioning rectangles?

• Divide the numbers

• Add the numbers together

• Subtract the numbers

• Split the number into its place values

Tags

CCSS.4.NBT.B.5

In the example of planting marigolds, how many marigolds are planted per foot of highway?

• 3

• 4

• 2

• 5

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

What is the product of 5,000 times 4 in the marigold problem?

• 2,000

• 2,000,000

• 20,000

• 200,000

Tags

CCSS.5.NBT.B.5

What is the total number of marigolds needed for the highway?

• 20,120

• 21,120

• 23,120

• 22,120

What is the main difference between partitioning rectangles and partial products?

• Partitioning rectangles use subtraction

• Partial products do not use a visual rectangle

• Partitioning rectangles do not use place values

• Partial products use addition

Tags

CCSS.4.NBT.B.5

In the practice problem, what is 50 times 7?

• 300

• 450

• 400

• 350

Tags

CCSS.4.NBT.B.5

What is the sum of 350 and 28 in the practice problem?

• 378

• 358

• 368

• 388

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What should you do if you have questions about the new method?

• Skip the problem

• Search online

• Talk to your math teacher

• Ask a friend

Tags

CCSS.5.NBT.A.2