Untitled Lesson

December 4, 2024

Teacher Facing

Grade 3 Mathematics

Unit 9: One and Two Step Problems Involving Multiple Operations

Lesson 1: Represent or Solve Problems Related to Addition and
Subtraction

December 4, 2024

Teacher Facing

Grade 3 Mathematics

Unit 9: One and Two Step Problems Involving Multiple Operations

Lesson 1: Represent or Solve Problems Related to Addition and
Subtraction

Student Assistance Form (SAF)

2

What is a SAF?

A SAF is an electronic referral form submitted when a Houston ISD student’s need
has been identified. Information provided in a SAF is immediately sent to a caring

professional to be processed.

Wraparound

Team

Campus

Staff

Students

Parents

Community

Members

School

Counselors

District

Personnel

Service
Providers

Who can submit a SAF?

SAF

Instructions

Scan

Submit a Student Assistance Form (SAF) to notify a caring professional about a

student’s need. A SAF can be submitted to connect a student to

resources/services for:

Identified a Need? Submit a SAF

www.HoustonISDsaf.com

•Housing

•Transportation

•and more!

•School Supplies

•Attendance/Truancy

Submit a SAF by scanning the QR code or by typing

•Mental Health

•Food/Clothing

4

MRS Icons

5

Timer Options (Silent)

6

Timer Options (Soft Music)

7

Timer Options (Fun Music)

8

9

10

Critical Slides

Slides with this icon are critical for
student mastery of the lesson
objective. While adjustments to meet
students’ individual needs are still
encouraged, please do not remove
this portion of the lesson.

Resources

11

Student

Teacher

●1 White Board

●1 Marker per student

●Student Activity Sheet

●Response Cards

●Slide Deck

December 4, 2024

Grade 3 Mathematics

Unit 9: One and Two Step Problems Involving Multiple Operations

Lesson 1: Represent or Solve Problems Related to Addition and
Subtraction

1. 4,270 - 890 =

2. 375 + 513=

3. 4,201 + 798 + 6=

4. 500 - 42=

5. 300 x 200 =

DO NOW

LO: SWBAT represent or solve one and two
step addition and subtraction problems.

DOL: Given a set of problems, students will
correctly represent or solve one and two step
addition and subtraction problems in at least 4
out of 5 problems.

MATH. 3.5 (A) represent one‐ and two‐step problems involving addition and subtraction of whole numbers to 1,000 using pictorial models, number lines, and
equations

MATH. 3.4 (A) solve with fluency one‐step and two‐step problems involving addition and subtraction within 1,000 using strategies based on place value,
properties of operations, and the relationship between addition and subtraction

Academic Vocabulary

15

Sum

Difference

Equation

Strip Diagram

Unknown Term

15 + 20 = 35

35 - 15 = 20

35 - 15 = 20

35

15

?

15 + = 35

Sprint: Add by Eight

Timer Vector by Vecteezy.com

16

Inspiration Partnership Team Vector by Vecteezy.com

17

Today, you will review how to represent or solve
one and two step addition and subtraction
problems.

Essential Question

18

Image by OpenClipart-Vectors from Pixabay

Understanding the context of a word
problem can help you by…..

How can understanding
the context of a word
problem help you find
the solution?

19

A grocery store stocked 300 cartons of milk for the day. At closing time, 57 cartons were
still on the shelves.

How many cartons of milk were sold that day?
What is the story about?
What do we need to find out?
What do we know?
Let's represent the problem using a strip diagram.Let's represent the number of milk cartons stocked in the grocery store.

300

57

?

Let's represent the number of milk cartons still on the shelves.

Now, let's represent the number of milk cartons sold.

Stocked cartons of milk

Cartons of milk left

Cartons of milk sold

Discuss with your partner, what
equation can you write to represent
the number of milk cartons sold?

+ 57 = 300

Milk packages Vector by Vecteezy.com

20

300 – 57 =

Solve using a

strategy of
your choice.

The grocery store sold ______ cartons of milk.

243

Let's write an equation to solve for the number of
milk cartons sold.

Milk packages Vector by Vecteezy.com

A grocery store stocked 300 cartons of milk for the day. At closing time, 57 cartons
were still on the shelves.

How many cartons of milk were sold that day?

21

A movie theater had500 tickets available for a show. At showtime, 43 tickets
remained unsold.

How many tickets were sold?

The movie theater sold ______ tickets.

457

Movie time poster with cinema Vector by Vecteezy.com

22

Emma, Jack, and Liam each brought a box of supplies to the school drive.

●The weight of Emma’s box was 95 pounds.

●The weight of Jack’s box was 40 pounds.

●The weight of Liam’s box was 28 pounds.

What was the difference in pounds between the weight of Emma’s box and the combined weight of Jack’s
and Liam’s boxes?

What is the story about?
What do we need to find out?
What do we know?

Let's use a strip diagram to represent the problem.

95

40

Emma's box

Difference

Jack's box

28

Liam's box

?

Let's represent the weight of Emma box.

Let's represent the weight of Jack and Liam's boxes.

Now, let's represent the difference between the weight of Emma's box and Jack and Liam's boxes.

23

Emma, Jack, and Liam each brought a box of supplies to the school drive.

●The weight of Emma’s box was 95 pounds.

●The weight of Jack’s box was 40 pounds.

●The weight of Liam’s box was 28 pounds.

What was the difference in pounds between the weight of Emma’s box and the combined weight of Jack’s
and Liam’s boxes?

Write an equation and solve for the combined weight of Jack and Liam's
boxes.
40 + 28 = 68

Write an equation to find the difference between the weight of Emma’s box
and the combined weight of Jack’s and Liam’s boxes.

95 – 68 =

The difference in pounds is _________ .

27

Solve using a
strategy of
your choice.

24

Oliver, Sophia, and James each donated a bag of canned goods to a food bank.

●The weight of Oliver’s bag was 91 pounds.

●The weight of Sophia’s bag was 45 pounds.

●The weight of James’s bag was 38 pounds.

What was the difference in pounds between the weight of Oliver’s bag and the
combined weight of Sophia’s and James’s bags?

The difference in pounds is _________ .

8

Set of canned food Vector by Vecteezy.com

25

At a car wash event, 85 cars were washed on Saturday. On Sunday, 47 more
cars were washed than on Saturday.

What was the total number of cars washed over the two days?

There were _________ cars washed over two days.

a. Draw a strip diagram to represent the problem.

?

85

85

47

b. Solve.

217

Male employees helping to wash cars Vector by Vecteezy.com

26

An electronics store sold 300 items last week.

●They sold 100 televisions and 120 game systems.

●The rest of the items sold were sound systems.

Which model represents one way to find the number of sound systems sold?

?

100

120

300

A.

B.

C.

D.

120

300

100

?

Practice

27

Practice

A library had 150 new books on display. By the end of the month, 39 books were
still available for checkout.

How many books were checked out during the month?

Choose the correct answer from the drop-down menu to complete the statement.

There were books checked out.

(Select)

189

121

129

111

Bookshelf with children's books Pro Vector by Vecteezy.com

28

David has $276 in his account.

●On Friday he put $60 more into his account.

●On Saturday he took out $154 to buy a new cell phone.

Which equation can be used to find the amount of money David had in his bank account
after he took out money on Saturday?

A.

276 – 60 – 154 =

B.

276 – 60 + 154 =

C.

276 + 60 – 154 =

D.

276 + 60 + 154 =

Practice

Mobile Phone Cartoon Pro Vector by Vecteezy.com

29

Practice

Zoey is driving to her family’s cabin, which is 320 miles away. She has 135 miles left to
travel before she arrives.

How many miles has Zoey already traveled?

Record your answer in the space provided.

1

2

3

4

5

6

7

8

9

0

.

x

185

A Frame Lodge Vector by Vecteezy.com

30

Practice

Mia, Noah, and Ava each donated a bundle of blankets to a shelter.

●The weight of Mia’s bundle was 84 pounds.

●The weight of Noah’s bundle was 33 pounds.

●The weight of Ava’s bundle was 29 pounds.

What was the difference in pounds between the weight of Mia’s bundle and the
combined weight of Noah’s and Ava’s bundles?

A.

62 pounds

B.

22 pounds

C.

146 pounds

D.

32 pounds

Recap

31

Marie represented the following problem using a strip diagram. Do you agree with her strip diagram?
Why or why not?

A fruit stand sold 93 apples on Monday. On Tuesday, it sold 36 more apples than on Monday.

What was the total number of apples sold over the two days?

?

93

36

I ________ with Marie's strip diagram because _____________.
(agree/disagree)

Red apple in basket Vector by Vecteezy.com

32

Image by OpenClipart-Vectors from Pixabay

Essential Question Debrief

Understanding the context of a word
problem can help you by…..

How can understanding
the context of a word
problem help you find
the solution?

33

DOL: Given a set of
problems, students
will correctly
represent or solve
one and two step
addition and
subtraction
problems in at
least 4 out of 5
problems.

Demonstration of Learning

Learner Slides

Learner Slides

34

What is this story about?

This story is about __________________________________

What is the question asking
me to find out?

The question is asking me to find out __________________

What information do I know
about the story?

I know ______________________________________________

Mark driving to his parent's house.

the number of miles Mark
still needs to travel.

the total miles Mark needs to travel and the miles he has
already driven.

35

Mark needs to drive 520 miles to reach his parents' house. He has already driven 275
miles. How many miles does Mark have left to drive?

36

Mark needs to drive 520 miles to reach his parents' house. He has already driven 275
miles. How many miles does Mark have left to drive?

520

275

?

Label the strip diagram to represent the miles Mark has left to drive.

Write an equation representing the miles Mark has left to drive.

275 + = 520

Motion of road under blue sky and white clouds Vector by Vecteezy.com

37

Mark needs to drive 520 miles to reach his parents' house. He has already driven 275
miles. How many miles does Mark have left to drive?

Write an equation to solve for the miles Mark has left to drive.

520 – 275 =

Solve.

Mark has ________ miles left to drive.

245

Motion of road under blue sky and white clouds Vector by Vecteezy.com

What is this story about?

This story is about __________________________________

What is the question asking
me to find out?

The question is asking me to find out __________________

What information do I know
about the story?

I know ______________________________________________

a sale happening for two days.

the total number of items
sold during the sale.

how many items were sold on the first day, and more items
were sold on the second day.

38

In a two-day sale, 150 items were sold on the first day. On the second day, 92 more items
were sold than on the first day. What was the total number of items sold during the sale?

39

In a two-day sale, 150 items were sold on the first day. On the second day, 92 more items
were sold than on the first day. What was the total number of items sold during the sale?

Label the strip diagram to represent the total number of items sold.

?

150

150

92

Write an equation to determine the total number of items sold during the sale.

150 + 150 + 92 =

Red ''Sale'' Tags Vector by Vecteezy.com

40

In a two-day sale, 150 items were sold on the first day. On the second day, 92 more items
were sold than on the first day. What was the total number of items sold during the sale?

Solve.

There were _______ items sold during the sale.

392

Red ''Sale'' Tags Vector by Vecteezy.com

During a weekend festival, 230 people attended on Saturday. On Sunday, 75 more people
attended than on Saturday.

How many people attended the festival over the two days?

Choose the correct answer from the drop-down menu to complete the statement.

There were people who attended the festival.

(Select)

435

155

535

305

41

42

A bakery made 200 cupcakes for a party. By the end of the party, 47 cupcakes were left
uneaten.

How many cupcakes were eaten during the party?

Record your answer in the space provided.

1

2

3

4

5

6

7

8

9

0

.

x

153

43

What is this story about?

This story is about __________________________________

What is the question asking
me to find out?

The question is asking me to find out __________________

What information do I know
about the story?

I know ______________________________________________

a delivery truck delivering packages.

how much heavier is the
second package than the
first package.

the weight of the two packages.

44

A delivery truck has two packages. One package weighs 125 pounds, and the second
package weighs 290 pounds. How much heavier is the second package than the first
package?

45

A delivery truck has two packages. One package weighs 125 pounds, and the second
package weighs 290 pounds. How much heavier is the second package than the first
package?

Draw a strip diagram to represent the problem.

290

125

?

Write an equation to represent the problem.

290 – 125 =

46

A delivery truck has two packages. One package weighs 125 pounds, and the second
package weighs 290 pounds. How much heavier is the second package than the first
package?

Solve.

The second package is ________ pounds heavier than the first package.

165

A book has two sections. The first section has 135 pages, and the second
section has 294 pages.

How many more pages are in the second section than in the first section?

Record your answer in the space provided.

159

Student Assistance Form (SAF)

2

What is a SAF?

A SAF is an electronic referral form submitted when a Houston ISD student’s need
has been identified. Information provided in a SAF is immediately sent to a caring

professional to be processed.

Wraparound

Team

Campus

Staff

Students

Parents

Community

Members

School

Counselors

District

Personnel

Service
Providers

Who can submit a SAF?

SAF

Instructions

Scan

Submit a Student Assistance Form (SAF) to notify a caring professional about a

student’s need. A SAF can be submitted to connect a student to

resources/services for:

Identified a Need? Submit a SAF

www.HoustonISDsaf.com

•Housing

•Transportation

•and more!

•School Supplies

•Attendance/Truancy

Submit a SAF by scanning the QR code or by typing

•Mental Health

•Food/Clothing

4

MRS Icons

5

Timer Options (Silent)

6

Timer Options (Soft Music)

7

Timer Options (Fun Music)

8

9

10

Critical Slides

Slides with this icon are critical for
student mastery of the lesson
objective. While adjustments to meet
students’ individual needs are still
encouraged, please do not remove
this portion of the lesson.

Resources

11

Student

Teacher

●1 White Board

●1 Marker per student

●Student Activity Sheet

●Response Cards

●Slide Deck

December 4, 2024

Grade 3 Mathematics

Unit 9: One and Two Step Problems Involving Multiple Operations

Lesson 1: Represent or Solve Problems Related to Addition and
Subtraction

1. 4,270 - 890 =

2. 375 + 513=

3. 4,201 + 798 + 6=

4. 500 - 42=

5. 300 x 200 =

DO NOW

LO: SWBAT represent or solve one and two
step addition and subtraction problems.

DOL: Given a set of problems, students will
correctly represent or solve one and two step
addition and subtraction problems in at least 4
out of 5 problems.

MATH. 3.5 (A) represent one‐ and two‐step problems involving addition and subtraction of whole numbers to 1,000 using pictorial models, number lines, and
equations

MATH. 3.4 (A) solve with fluency one‐step and two‐step problems involving addition and subtraction within 1,000 using strategies based on place value,
properties of operations, and the relationship between addition and subtraction

Academic Vocabulary

15

Sum

Difference

Equation

Strip Diagram

Unknown Term

15 + 20 = 35

35 - 15 = 20

35 - 15 = 20

35

15

?

15 + = 35

Sprint: Add by Eight

Timer Vector by Vecteezy.com

16

Inspiration Partnership Team Vector by Vecteezy.com

17

Today, you will review how to represent or solve
one and two step addition and subtraction
problems.

Essential Question

18

Image by OpenClipart-Vectors from Pixabay

Understanding the context of a word
problem can help you by…..

How can understanding
the context of a word
problem help you find
the solution?

19

A grocery store stocked 300 cartons of milk for the day. At closing time, 57 cartons were
still on the shelves.

How many cartons of milk were sold that day?
What is the story about?
What do we need to find out?
What do we know?
Let's represent the problem using a strip diagram.Let's represent the number of milk cartons stocked in the grocery store.

300

57

?

Let's represent the number of milk cartons still on the shelves.

Now, let's represent the number of milk cartons sold.

Stocked cartons of milk

Cartons of milk left

Cartons of milk sold

Discuss with your partner, what
equation can you write to represent
the number of milk cartons sold?

+ 57 = 300

Milk packages Vector by Vecteezy.com

20

300 – 57 =

Solve using a

strategy of
your choice.

The grocery store sold ______ cartons of milk.

243

Let's write an equation to solve for the number of
milk cartons sold.

Milk packages Vector by Vecteezy.com

A grocery store stocked 300 cartons of milk for the day. At closing time, 57 cartons
were still on the shelves.

How many cartons of milk were sold that day?

21

A movie theater had500 tickets available for a show. At showtime, 43 tickets
remained unsold.

How many tickets were sold?

The movie theater sold ______ tickets.

457

Movie time poster with cinema Vector by Vecteezy.com

22

Emma, Jack, and Liam each brought a box of supplies to the school drive.

●The weight of Emma’s box was 95 pounds.

●The weight of Jack’s box was 40 pounds.

●The weight of Liam’s box was 28 pounds.

What was the difference in pounds between the weight of Emma’s box and the combined weight of Jack’s
and Liam’s boxes?

What is the story about?
What do we need to find out?
What do we know?

Let's use a strip diagram to represent the problem.

95

40

Emma's box

Difference

Jack's box

28

Liam's box

?

Let's represent the weight of Emma box.

Let's represent the weight of Jack and Liam's boxes.

Now, let's represent the difference between the weight of Emma's box and Jack and Liam's boxes.

23

Emma, Jack, and Liam each brought a box of supplies to the school drive.

●The weight of Emma’s box was 95 pounds.

●The weight of Jack’s box was 40 pounds.

●The weight of Liam’s box was 28 pounds.

What was the difference in pounds between the weight of Emma’s box and the combined weight of Jack’s
and Liam’s boxes?

Write an equation and solve for the combined weight of Jack and Liam's
boxes.
40 + 28 = 68

Write an equation to find the difference between the weight of Emma’s box
and the combined weight of Jack’s and Liam’s boxes.

95 – 68 =

The difference in pounds is _________ .

27

Solve using a
strategy of
your choice.

24

Oliver, Sophia, and James each donated a bag of canned goods to a food bank.

●The weight of Oliver’s bag was 91 pounds.

●The weight of Sophia’s bag was 45 pounds.

●The weight of James’s bag was 38 pounds.

What was the difference in pounds between the weight of Oliver’s bag and the
combined weight of Sophia’s and James’s bags?

The difference in pounds is _________ .

8

Set of canned food Vector by Vecteezy.com

25

At a car wash event, 85 cars were washed on Saturday. On Sunday, 47 more
cars were washed than on Saturday.

What was the total number of cars washed over the two days?

There were _________ cars washed over two days.

a. Draw a strip diagram to represent the problem.

?

85

85

47

b. Solve.

217

Male employees helping to wash cars Vector by Vecteezy.com

26

An electronics store sold 300 items last week.

●They sold 100 televisions and 120 game systems.

●The rest of the items sold were sound systems.

Which model represents one way to find the number of sound systems sold?

?

100

120

300

A.

B.

C.

D.

120

300

100

?

Practice

27

Practice

A library had 150 new books on display. By the end of the month, 39 books were
still available for checkout.

How many books were checked out during the month?

Choose the correct answer from the drop-down menu to complete the statement.

There were books checked out.

(Select)

189

121

129

111

Bookshelf with children's books Pro Vector by Vecteezy.com

28

David has $276 in his account.

●On Friday he put $60 more into his account.

●On Saturday he took out $154 to buy a new cell phone.

Which equation can be used to find the amount of money David had in his bank account
after he took out money on Saturday?

A.

276 – 60 – 154 =

B.

276 – 60 + 154 =

C.

276 + 60 – 154 =

D.

276 + 60 + 154 =

Practice

Mobile Phone Cartoon Pro Vector by Vecteezy.com

29

Practice

Zoey is driving to her family’s cabin, which is 320 miles away. She has 135 miles left to
travel before she arrives.

How many miles has Zoey already traveled?

Record your answer in the space provided.

1

2

3

4

5

6

7

8

9

0

.

x

185

A Frame Lodge Vector by Vecteezy.com

30

Practice

Mia, Noah, and Ava each donated a bundle of blankets to a shelter.

●The weight of Mia’s bundle was 84 pounds.

●The weight of Noah’s bundle was 33 pounds.

●The weight of Ava’s bundle was 29 pounds.

What was the difference in pounds between the weight of Mia’s bundle and the
combined weight of Noah’s and Ava’s bundles?

A.

62 pounds

B.

22 pounds

C.

146 pounds

D.

32 pounds

Recap

31

Marie represented the following problem using a strip diagram. Do you agree with her strip diagram?
Why or why not?

A fruit stand sold 93 apples on Monday. On Tuesday, it sold 36 more apples than on Monday.

What was the total number of apples sold over the two days?

?

93

36

I ________ with Marie's strip diagram because _____________.
(agree/disagree)

Red apple in basket Vector by Vecteezy.com

32

Image by OpenClipart-Vectors from Pixabay

Essential Question Debrief

Understanding the context of a word
problem can help you by…..

How can understanding
the context of a word
problem help you find
the solution?

33

DOL: Given a set of
problems, students
will correctly
represent or solve
one and two step
addition and
subtraction
problems in at
least 4 out of 5
problems.

Demonstration of Learning

Learner Slides

Learner Slides

34

What is this story about?

This story is about __________________________________

What is the question asking
me to find out?

The question is asking me to find out __________________

What information do I know
about the story?

I know ______________________________________________

Mark driving to his parent's house.

the number of miles Mark
still needs to travel.

the total miles Mark needs to travel and the miles he has
already driven.

35

Mark needs to drive 520 miles to reach his parents' house. He has already driven 275
miles. How many miles does Mark have left to drive?

36

Mark needs to drive 520 miles to reach his parents' house. He has already driven 275
miles. How many miles does Mark have left to drive?

520

275

?

Label the strip diagram to represent the miles Mark has left to drive.

Write an equation representing the miles Mark has left to drive.

275 + = 520

Motion of road under blue sky and white clouds Vector by Vecteezy.com

37

Mark needs to drive 520 miles to reach his parents' house. He has already driven 275
miles. How many miles does Mark have left to drive?

Write an equation to solve for the miles Mark has left to drive.

520 – 275 =

Solve.

Mark has ________ miles left to drive.

245

Motion of road under blue sky and white clouds Vector by Vecteezy.com

What is this story about?

This story is about __________________________________

What is the question asking
me to find out?

The question is asking me to find out __________________

What information do I know
about the story?

I know ______________________________________________

a sale happening for two days.

the total number of items
sold during the sale.

how many items were sold on the first day, and more items
were sold on the second day.

38

In a two-day sale, 150 items were sold on the first day. On the second day, 92 more items
were sold than on the first day. What was the total number of items sold during the sale?

39

In a two-day sale, 150 items were sold on the first day. On the second day, 92 more items
were sold than on the first day. What was the total number of items sold during the sale?

Label the strip diagram to represent the total number of items sold.

?

150

150

92

Write an equation to determine the total number of items sold during the sale.

150 + 150 + 92 =

Red ''Sale'' Tags Vector by Vecteezy.com

40

In a two-day sale, 150 items were sold on the first day. On the second day, 92 more items
were sold than on the first day. What was the total number of items sold during the sale?

Solve.

There were _______ items sold during the sale.

392

Red ''Sale'' Tags Vector by Vecteezy.com

During a weekend festival, 230 people attended on Saturday. On Sunday, 75 more people
attended than on Saturday.

How many people attended the festival over the two days?

Choose the correct answer from the drop-down menu to complete the statement.

There were people who attended the festival.

(Select)

435

155

535

305

41

42

A bakery made 200 cupcakes for a party. By the end of the party, 47 cupcakes were left
uneaten.

How many cupcakes were eaten during the party?

Record your answer in the space provided.

1

2

3

4

5

6

7

8

9

0

.

x

153

43

What is this story about?

This story is about __________________________________

What is the question asking
me to find out?

The question is asking me to find out __________________

What information do I know
about the story?

I know ______________________________________________

a delivery truck delivering packages.

how much heavier is the
second package than the
first package.

the weight of the two packages.

44

A delivery truck has two packages. One package weighs 125 pounds, and the second
package weighs 290 pounds. How much heavier is the second package than the first
package?

45

A delivery truck has two packages. One package weighs 125 pounds, and the second
package weighs 290 pounds. How much heavier is the second package than the first
package?

Draw a strip diagram to represent the problem.

290

125

?

Write an equation to represent the problem.

290 – 125 =

46

A delivery truck has two packages. One package weighs 125 pounds, and the second
package weighs 290 pounds. How much heavier is the second package than the first
package?

Solve.

The second package is ________ pounds heavier than the first package.

165

A book has two sections. The first section has 135 pages, and the second
section has 294 pages.

How many more pages are in the second section than in the first section?

Record your answer in the space provided.

159