G5 Math Module 2 Lesson 12

Multiple Choice

Which of the following best describes the concept of multiplying a whole number by a decimal with hundredths?

• It always results in a whole number.

• It involves using place value understanding and estimation.

• It is the same as multiplying two whole numbers.

• It cannot be represented visually.

Open Ended

Why is it important to understand how to multiply decimals by whole numbers in real life?

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Multiple Choice

Which of the following is the correct decimal representation of 8 tenths?

• 0.8

• 8.0

• 0.08

• 80

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Multiple Choice

Which of the following numbers is equal to 2.0?

• 20 tenths

• 2 tenths

• 0.2

• 200 tenths

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Multiple Choice

Select all the correct decimal representations for the following tenths: 8 tenths, 6 tenths, and 63 tenths.

• 0.8, 0.6, 6.3

• 8.0, 6.0, 63.0

• 0.08, 0.06, 0.63

• 80, 60, 630

Open Ended

How does understanding place value help in converting tenths to decimals?

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Multiple Choice

What is the decimal representation of 25 tenths?

• 2.5

• 0.25

• 25.0

• 0.025

Multiple Choice

How many kilograms of food do 32 cyclists need if each requires 8.3 kilograms for the trip?

• 265.6 kg

• 83 kg

• 256 kg

• 32 kg

Multiple Choice

What is the main concept being developed in Lesson 12?

• Reasoning about the product of a whole number and a decimal with hundredths

• Adding whole numbers

• Subtracting decimals

• Dividing by whole numbers

Multiple Select

Which of the following are equivalent to 2.5?

• 25 tenths

• 2 and 5 tenths

• 250 hundredths

• 0.25

Open Ended

Explain why we can change decimals like 2.5, 9.8, and 13.4 to whole numbers with a different name (such as 25 tenths, 98 tenths, and 134 tenths).

Open Ended

What math operation allows us to move the digits?

Multiple Choice

Which number should be multiplied with 2.57 to get 257 hundredths?

• 10

• 100

• 0.1

• 1

Multiple Select

Select all equations that correctly show how to convert a decimal to hundredths.

• 2.57 x 100 = 257 hundredths

• 9.84 x 100 = 984 hundredths

• 2.57 x 10 = 257 hundredths

• 9.84 x 10 = 984 hundredths

Open Ended

What is the first step you would take to make the multiplication 2.31 x 22 easier when working with decimals?

Open Ended

What math strategy helps us multiply numbers as large as 2.31 × 22?

Open Ended

How does the number of digits in the numbers being multiplied affect the size of the area model?

Multiple Choice

Which model can be used to multiply 2.31 by 22?

• Area model

• Number line

• Pie chart

• Bar graph

Multiple Choice

What is the product of 231 and 22?

• 5082

• 4532

• 5122

• 4622

Multiple Choice

Estimate the product of 2.45 and 3.05 using the standard algorithm. What is the closest whole number to your answer?

• 7

• 8

• 6

• 9

Open Ended

What is one key concept you learned today about multiplying whole numbers and decimals?