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Teacher Edition

Math on the Spot Video Tutor Online Assessment

System

Soar to Success Math Online Intervention

iTools Virtual Manipulatives

Digital ManagementCenter organizes program resources by TEKS!

Interactive Student Edition provides students

with an interactive learning environment!

Resources

e

Texas Essential Knowledge and Skills

Geometry and Measurement— 3.7.D Determine when it is appropriate to use measurements of liquid volume (capacity) or weight

3.7.E Determine liquid volume (capacity) or weight using appropriate units and tools

MATHEMATICAL PROCESSES3.1.C Select tools, technology, and techniques3.1.G Display, explain, and justify mathematical ideas and arguments

Are You Ready?Access Prior KnowledgeUse the Are You Ready? 18.7 in the Assessment Guide to assess students’ understanding of the prerequisite skills for this lesson.

Vocabularyweight, ounce (oz), pound (lb)

Go to Multimedia eGlossary at thinkcentral.com

Materialsscale, classroom objects

18.7 Customary Units for Weight How are ounces and pounds related? Essential Question?

Lesson OpenerMaking ConnectionsInvite students to tell you what they know about weight.

What everyday things are usually measured in weight? (Accept all reasonable responses.) What instruments or tools are used to measure weight? (a scale) What units of weight do you know? (Possible answers: ounces, pounds)

Using the Digital LessonShow students packages or items of different weights, including an object that weighs 8 ounces. Allow students to hold the items and compare how heavy or light the items are. Have them speculate on which item weighs 8 ounces. Ask students to imagine how heavy 4 of the items would be and decide if one of the items shown has a similar weight.

Learning TaskWhat is the problem the students are trying to solve? Connect the story to the problem.

• How many packages were left behind? (4)

• How much does each package weigh? (8 ounces)

• What are you being asked to find? (how much all four packages weigh)

• When you are asked to find the total of something, what operations can you use? (addition, multiplication)

Literacy and MathematicsChoose one or more of the following activities.

• Have students illustrate the problem to show the packages. Have them label each package with its weight.

• Write the words ounce and pound on the board and underline the ou in each word. Have students pronounce the ou sound. Ask them to work with a partner to write a list of other words with ou that have the same sound.

How are ounces and pounds related?

Lesson 18.7 601A

HandsOnUnlock the ProblemUnlock the Problem

1 oz 1 oz 1 oz 1 oz

1 oz 1 oz 1 oz 1 oz

1 oz 1 oz 1 oz 1 oz

1 oz 1 oz 1 oz 1 oz

Mathematical ProcessesMath Talk

Essential Question?

Geometry and Measurement—3.7.D, 3.7.E

MATHEMATICAL PROCESSES3.1.C, 3.1.G

Name

18.7 Customary Units for Weight

How are ounces and pounds related?

about 1about 1

_ ounces in _ pound

Sixteen ounces and one pound equal the same

weight. Finish the drawing of slices of bread to show

how ounces and pounds are related.

Try This!

One loaf of bread weighs

ounce.

pound.

One slice of bread weighs

ounce.

pound.

Weight is the measure of how heavy an object is.

Customary units for weight include ounce (oz)

and pound (lb).

Circle the correct word to complete

the sentences.

Suppose you weigh a bag of potatoes in pounds, and then

in ounces. Which number would be greater, the number

of ounces or the number of pounds? Explain.

116

Math Talk: the number of ounces; Possible explanation: because ounces are smaller units, it takes more to measure the weight of something.

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English Language Learners Language SupportELL

ELPS 4.C.4, 4.F.8, 4.F.10Leveled Activities ELPS

Beginning: Activity 20 1.A.1, 3.G.2, 4.C.3

Intermediate: Activity 32 2.C.3, 2.D.2, 4.F.5

Advanced: Activity 34 2.C.4, 2.I.5, 4.F.8

Advanced High: Activity 6 2.I.5, 3.G.2, 4.G.2

thinkcentral.com for the ELL Activity Guide containing these leveled activities.

Auditory / LinguisticSmall Group

Strategy: Model Language• Students can learn correct pronunciation by repeating sentences that

are modeled by native speakers.• Have students repeat sentences as they solve problems in the lesson.

For example: A _ weighs about one pound. A _ weighs about one ounce. The weight of the object is about _ pounds.

• Make sure students understand the difference in meaning, spelling, and pronunciation between weight and weigh. Write to weigh and weight on the board. Circle the letter t in weight. Point to the words as you say: To weigh is a verb. Weight is a noun. I weigh an object to get its weight.

Unlock the Problem• What are some other foods that might weigh

one ounce? Possible answers: a small box of raisins; a strawberry

• What are some other foods that might weigh one pound? Possible answers: a bag of rice; flour is usually sold in pounds

HandsOn

Math Talk Use Math Talk to check students’ understanding that the number of units needed to weigh something is related to the size of the basic measuring units used. That is, the number of ounces an object weighs is greater than the number of pounds it weighs.

Mathematical Processes

Try This!• How many slices of bread should be shown?

Explain. There should be 16 slices of bread. Possible explanation: We need to show enough slices of bread that will weigh the same as a loaf of bread: one pound. Since 16 ounces is the same weight as 1 pound, and each slice of bread weighs about 1 ounce, there should be 16 slices of bread.

• Can the statement at the bottom be written as 16 oz in 1 lb as well as 16 ounces in 1 pound? Yes. Possible answers: oz is the abbreviation for ounces and lb is the abbreviation for pound.

601 Module 18

Share and ShowShare and Show

HandsOn

Find an object in the classroom to match the description. Draw and label the object.

Choose the unit you would use to measure the weight. Write ounce or pound.

2.

3.

4.

5.

ounce.

pound.

Weight of ObjectsObjects Unit Weight

apple

book

pencil box

tape dispenser

STEP 1 Use a scale to measure to the nearest ounce or pound. Record the weight.

STEP 2 Repeat for each object.

Activity Materials ■ scale, classroom objects

1. A strawberry weighs about 1

6. greater than 1 pound 7. less than 1 pound

RememberRemember to include the units when recording the weights in the table.

poundouncepoundounce

Weights will vary.

Objects and drawings will vary.

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Go to Go to thinkcentral.com for additional enrichmentactivities in the Enrich Activity Guide.

Enrich Logical / MathematicalPartners

Materials: base-ten blocks (optional)

• Challenge students to compare weights given in different units by using a table to relate ounces to pounds.

• Draw the table shown below on the board. Then have students work together, using base-ten blocks, if needed, to complete the table.

• After students complete the table, have them complete the following comparison exercises, writing <, >, or =.1. 60 oz < 4 lb 2. 100 oz > 6 lb 3. 120 oz > 7 lb 4. 80 oz = 5 lb

1

2

3

a student misses the checked exercises

Quick Check

IF

THENDifferentiate Instruction withRtI Tier 1 Lesson 90

Activity• How many tape dispensers might be in one

pound? Answers will vary depending on the type of tape dispenser.

• What objects in your desk would you weigh in ounces? Possible answers: pencil, crayon, marker, eraser

Share and ShowThe first problem connects to the learning model.

Use the checked exercises for Quick Check. Students should show their answers for the Quick Check on the MathBoard.

HandsOn

pounds 1 2 3 4 5 6 7 8

ounces 16 32 48 64 80 96 112 128

Lesson 18.7 602

Unlock the ProblemUnlock the Problem

Name

9. Use Math Language Hank says that 32 ounces

is the same as 3 pounds. Does this statement make sense? Explain.

c. Representations Show the steps

you used to solve the problem.

d. Complete the sentences.

Sixteen ounces is the same weight

as __.

Each bag holds _ ounces of mix.

48 ounces can be separated

into _ groups of _ ounces

each.

So, Jared can fill _ bags with

1 pound of trail mix each.

a. What do you need to find?

b. What are two ways to describe the amount the bags can hold?

–

8. Multi-Step Jared has a canister

that has 48 ounces of home-made trail mix.

He wants to package the mix in bags that

each hold 1 pound of mix. How many bags

can Jared fill?

No; Possible explanation: since 16 ounces equals 1 pound,

32 ounces equals 2 pounds, not 3 pounds.

3

3 16

16

1 pound

1 pound, or 16 ounces

Possible answer: I drew 48 counters to

show 48 ounces. Then I circled groups of

16 to show one pound.

the number of bags that 48 ounces of mix will fi ll

Module 18 • Lesson 7 603

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LESSON 90

Weight is the measure of how heavy an object is. Two units of weight are ounce (oz) and pound (lb).

Nine pennies weighabout 1 ounce.

A box of pasta weighsabout 1 pound.

16 ounces = 1 pound

Choose the unit you would use to weigh this dog. Write ounce or pound.

Step 1 Think about whether a dog is light or heavy.

A dog usually weighs more than 9 pennies, or 1 ounce. A dog might weigh as much as several pasta boxes.

Step 2 Choose a unit of weight.

A pound is a good unit for measuring the weight of a dog.

Choose the unit you would use to measure the weight. Write ounce or pound.

1.

2.

3.

4.

5. Ana has 32 ounces of rice. She wants to put the rice into bags of one pound each. Circle groups of ounces that make one pound. Then rename the weight using pounds. 32 ounces in pounds

3.7.D, 3.7.ECustomary Units for WeightOBJECTIVE Relate customary units for weight and use them to measure weight.

Pasta

1 lb

Answers may vary.

Possible circling is shown.

ounce ounce or pound ounce

2

pound

Geometry and Measurement 179

Name

Enrich© Houghton Mifflin Harcourt Publishing Company

E88

Enrich 88

paper clip, pencil, computer

grape, bowl, table

ant, mouse, cat

whistle, football, football player

shoelace, watch, shoe

paper bag, sandwich, frying pan

Objects will vary. Check students’ answers.

keys, book, bicycle

Getting Heavier

Write the objects in order from least to greatest weight.

1. pencil, paper clip, computer

2. table, grape, bowl

3. mouse, cat, ant

4. shoelace, shoe, watch

5. football player, football, whistle

6. book, keys, bicycle

7. paper bag, frying pan, sandwich

8. Stretch Your Thinking Choose three objects. Write the objects in order from the least weight to the greatest weight.

Enrich 88RtI Tier 1 Lesson 90

Unlock the ProblemGo DeeperGive students the opportunity to analyze a statement and answer questions related to it.

• There are 16 ounces of peaches in 1 bag. What is the weight in pounds of 10 identical bags of peaches? Students should recognize that 16 ounces = 1 pound; so each bag weighs one pound; so 10 bags is 10 pounds

• What is the weight in pounds of 100 bags of the same bags of peaches? 100 bags is 100 pounds

ProblemsProblem 8 explores changing ounces to pounds.Students draw representations to help them solve the problem about putting trail mix into bags weighing 1 pound each.

In Problem 9, students are to use precise math language to explain their answer.

COMMON ERRORSError When drawing to change ounces to pounds, students will not circle the correct number of ounces.

Example

Springboard to Learning Remind students that there are 16 ounces in each pound, so they should check that they have drawn the correct number of items and circled groups of 16 to represent the measure.

CE

Math on the Spot Video Tutor

Through the Math on the Spot Video Tutor, students will be guided through an interactive solving of this type of H.O.T. problem. Use this video to also help students solve the H.O.T. problem in the Interactive Student Edition. With these videos and the H.O.T. problems, students will build skills needed in the TEXAS assessment.

MV

Math on the Spot videos are in theInteractive Student Edition and atthinkcentral.com.

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603 Module 18

Daily Assessment TaskDaily Assessment Task

Mathematical Processes

TEXAS Test Prep 13. There are 4 baseball caps at a store. Each cap weighs

8 ounces. How much do the caps weigh in all?

A 8 ounces

B 10 ounces

C 2 pounds

D 4 pounds

Fill in the bubble for the correct answer choice.

10. A watermelon weighs 6 pounds. Which item would be

about the same weight as the watermelon?

A 10-ounce package of straws

B 8 slices of cheese pizza

C 6 erasers

D 480 quarters

11. Brianna is building a doghouse. Each board weighs about

10 ounces. She lifts 8 boards at a time. About how much

does Brianna lift?

A 3 ounces C 5 pounds

B 4 ounces D 2 pounds

12. Multi-Step Sandra and Richelle baked 2 cakes. They

cut both cakes into 8 equal slices. Each slice weights about

2 ounces. Which is the combined weight of the cakes?

A 4 ounces C 16 ounces

B 2 pounds D 1 pound

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Daily Assessment Task 1

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Differentiated Centers Kit

• Soar to Success MathWarm-Up 42.05, 42.06

LiteratureHow Heavy? How Much?Students will read about customary units of measures used to buy groceries.

ActivitiesRace-A-WeighStudents will complete the purple Activity Card 6 by estimating the weight/mass of objects.

• Enrich 88

• Homework and Practice Lesson 18.7

Do students understand how ounces and pounds are related?

TEXAS Test Prep CoachTest Prep Coach helps teachers to identify common errors that students can make.

In the Test Prep exercise, if students selected:

A They only considered one cap.

B They did not read the problem correctly.

D They thought that 8 ounces equaled 1 pound.

Essential Question? WriteMathWriteMath

How are ounces and pounds related? Both are used to measure weight. There are 16 ounces in every pound. So, ounces are used to measure small amounts and pounds are used to measure larger amounts.

Lesson 18.7 604

TEXAS Test PrepLesson CheckLesson Check

Fill in the bubble completely to show your answer.

10. A small paperback book weighs

about 10 ounces. Which item would

be about the same weight as the

paperback book?

A a slice of pizza

B a pound of potatoes

C a quart of milk

D a radio

11. A bag of onions weighs about

3 pounds. Which items would be

about the same weight as the bag

of onions?

A 20 balloons

B 5 turkeys

C 10 tomatoes

D 15 feathers

12. Multi-Step A worker loads boxes of

sugar. Each box weighs 16 ounces.

The worker loads 20 boxes at one

time. How many pounds of sugar

does the worker load?

A 36 pounds

B 20 pounds

C 16 pounds

D 10 pounds

13. Multi-Step Otis bakes 8 mini

loaves of bread. Each loaf weighs

about 8 ounces. About how many

pounds of bread does Otis bake?

A 4 pounds

B 6 pounds

C 5 pounds

D 3 pounds

14. Multi-Step Yogurt comes in

containers that weigh 4 ounces.

Each pack contain 6 yogurt

containers. If Otis buys 2 packs of

yogurt, how many pounds of yogurt

does he buy?

A 4 pounds

B 2 pounds

C 3 pounds

D 5 pounds

15. Multi-Step There are 5 bananas in

a bunch. Each banana weighs about

8 ounces. How many pounds and

ounces does the bunch of bananas

weigh?

A 2 pounds 8 ounces

B 1 pound 8 ounces

C 2 pounds 5 ounces

D 1 pound 5 ounces

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Homeworkand Practice

Name

Problem SolvingProblem Solving

Customary Units for Weight18.7

Geometry and Measurement—3.7.D, 3.7.EMATHEMATICAL PROCESSES 3.1.C, 3.1.G

Choose the unit you would use to measure the weight.Write ounce or pound.

1. 2. 3.

4. 5. 6.

7. Multi-Step Janet buys 6 bags of

potatoes. Each bag holds 8 ounces.

How many pounds of potatoes does

Janet buy?

8. Multi-Step Pedro buys 2 pounds

8 ounces of tomatoes. How many

ounces of tomatoes does Pedro buy?

9. Sonny has a bag that holds 32 ounces of rice. He wants

to divide the rice into boxes that hold 1 pound each.

How many boxes can Jared fill? Draw a picture to solve

the problem. Explain how you solved the problem.

ounce

ounce

ounce

pound

pound

pound

Check students’ drawings.

3 pounds

2 boxes; possible explanation: I drew 32 counters to show

32 ounces. Then I circled groups of 16 to show one pound.

So, 32 ounces equals 2 pounds.

40 ounces

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Module 18 • Lesson 7 605

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Homework and PracticeUse the Homework and Practice pages to provide students with more practice on the concepts and skills of this lesson.

605-606 Module 18