Modeling Multiplying Decimals with Hundredths Grids

This video tutorial covers multiplying decimals using visual models. The teacher demonstrates two examples: multiplying 210 by 4/10 and 510 by 410, using colored pencils to shade and overlap areas on a grid. Students are instructed to complete two additional practice problems for homework, ensuring they understand the vertical and horizontal shading technique to find the product of decimals.

What materials are necessary for modeling multiplying decimals?

• Laptop and spreadsheet software

• Spiral with 100 SC and map pencils

• Calculator and ruler

• Graph paper and markers

What is the main learning goal of the video tutorial?

• Understanding decimal division

• Modeling multiplying decimals

• Mastering fraction multiplication

• Learning decimal addition

In the first example, what is the product of 2.10 and 0.4?

• 84

• 0.84

• 8.4

• 0.084

How are the numbers represented visually in the examples?

• With line plots

• Through pie charts

• By shading on a 100 square chart

• Using bar graphs

What is the purpose of changing colors when shading for different numbers?

• It's just for aesthetic purposes

• No specific reason

• To confuse the students

• To differentiate between the two numbers being multiplied

What is the result of the second example problem?

• 0.2

• 20

• 200

• 2

How should the first number in a multiplication problem be shaded?

• Diagonally

• Vertically

• Horizontally

• In a circular pattern

What is the significance of the numbers that overlap when shading?

• They represent the total number of hundreds

• They should be ignored

• They indicate mistakes in shading

• They are irrelevant to the solution

What should students do if they have questions about the homework problems?

• Ask during class

• Guess the answers

• Skip the homework

• Look for answers online

For the homework, what multiplication problem involving tenths is given?

• 8/10 times 7/10

• 2/10 times 7/10

• 5/10 times 4/10

• 3/10 times 9/10