1. Module 2 Lesson 11 Fraction Multiplication and the Products of Decimals.notebook
1
December 12, 2014
Add to back of study guide:
· Know how to read a tape diagram to identify the division
equation.
· Know the following vocabulary words and be able to identify
them in an equation:
addend difference dividend
divisor factor minuend
product quotient subtrahend
sum
Dec 12­7:
35 AM

2. Module 2 Lesson 11 Fraction Multiplication and the Products of Decimals.notebook
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December 12, 2014
Aug 26­5:
55 PM
Lesson 10 Homework Review

3. Module 2 Lesson 11 Fraction Multiplication and the Products of Decimals.notebook
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December 12, 2014
MODULE 2 Arithmetic Operations Including
Division of Fractions
Topic B: Multi‐Digit Decimal Operations—Adding,
Subtracting, and Multiplying
Lesson 11: Fraction Multiplication and the
Products of Decimals
Aug 26­5:
45 PM
Student Outcomes
§ Students use estimation and place value to determine the placement of the decimal point in products and to determine that the size of the product is relative to each factor.
§ Students discover and use connections between fraction multiplication and decimal multiplication.
§ Students recognize that the sum of the number of decimal digits in the factors yields the decimal digits in the product.

4. Module 2 Lesson 11 Fraction Multiplication and the Products of Decimals.notebook
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December 12, 2014
Exploratory Challenge
You will not only solve each problem, but your groups will also need to prove
to the class that the decimal in the product is located in the correct place. As a
group, you will be expected to present your informal proof to the class.
1. Calculate the product.
Proofs that the decimal is in the right place...
(hint: try fractions or estimation)
Nov 17­2:
28 PM

5. Module 2 Lesson 11 Fraction Multiplication and the Products of Decimals.notebook
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December 12, 2014
2. Xavier earns $11.50 per hour working at the nearby grocery store. Last week,
Xavier worked for 13.5 hours. How much money did Xavier earn last week?
Remember to round to the nearest penny.
Nov 17­2:
29 PM

6. Module 2 Lesson 11 Fraction Multiplication and the Products of Decimals.notebook
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December 12, 2014
§ Do you see a connection between the number of decimal digits in the
factors and the product?
ú In the first problem, there are two decimal digits in the first factor
and one decimal digit in the second factor, which is a total of three
decimal digits. The product has three decimal digits.
ú In the second problem, both factors have one decimal digit for a
total of two decimal digits in the factors. The product also has two
decimal digits.
Nov 17­2:
29 PM
34.62
x 12.8
443.136
11.5
x 13.5
155.25
The # of digits after the decimals in
the factors tells us how many digits
are after the decimal in our product.

7. Module 2 Lesson 11 Fraction Multiplication and the Products of Decimals.notebook
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December 12, 2014
Dec 16­10:
57 AM
1. Calculate the product

8. Module 2 Lesson 11 Fraction Multiplication and the Products of Decimals.notebook
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December 12, 2014
2. Kevin spends $11.25 on lunch every week during the school year. If there are
35.5 weeks during the school year, how much does Kevin spend on lunch over the
entire school year? Remember to round to the nearest penny.
Kevin would spend $399.38
on lunch over the entire
Nov 17­2:
29 PM
school year.

9. Module 2 Lesson 11 Fraction Multiplication and the Products of Decimals.notebook
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December 12, 2014
3. Gunnar’s car gets 22.4 miles per gallon, and his gas tank can hold 17.82
gallons of gas. How many miles can Gunnar travel if he uses all of the gas in the
gas tank?
Gunnar can drive 399.168
miles on an entire tank of
gas.
Nov 17­2:
29 PM

10. Module 2 Lesson 11 Fraction Multiplication and the Products of Decimals.notebook
December 12, 2014
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4. The principal of East High School wants to extend the cover for the
sand pit used in the long jump competition. It is currently 4 ft2 He measured
the sand pit and found that the length is 29.2 feet and the width is 9.8 feet for
the extension. What will the total area of the cover be?
The cover should have
Nov 17­2:
29 PM
an area of
290.16 square feet.

11. Module 2 Lesson 11 Fraction Multiplication and the Products of Decimals.notebook
December 12, 2014
11
Closing
§ How can we use information about the factors to determine the largest place
value of the product and the number of decimal digits in the product?
Please take out your exit ticket for Lesson 11, close your
binder, and complete the exit ticket. This will be collected.
Aug 26­8:
21 PM