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Topic D a dding and subtracting decimals. STANDARD - 5.NBT.2, 5.NBT.3, 5.NBT.7. Grade 5 Module 1 Lesson 9. Objective: A dd decimals using place value 
strategies and relate those strategies 
to a written method. MATERIALS NEEDED FOR THIS LESSON. Student. P ersonal White Boards

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Topic D a dding and subtracting decimals

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Topic d a dding and subtracting decimals

Topic D

adding and subtracting decimals

STANDARD - 5.NBT.2, 5.NBT.3, 5.NBT.7


Topic d a dding and subtracting decimals

Grade 5

Module 1 Lesson 9

Objective:

Add decimals using place value 
strategies and relate those strategies 
to a written method.


Topic d a dding and subtracting decimals

MATERIALS NEEDED

FOR THIS LESSON

Student

Personal White Boards

place value disks

Student Pages

Sprint A & B

Problem Set

Exit Ticket

Homework

Teacher

Teacher Pages


Topic d a dding and subtracting decimals

Fluency Practice(14 minutes)


Topic d a dding and subtracting decimals

Round to the Nearest One

8 minutes

5.NBT.4

SPRINT A

1 minutes

Do as many problems as you can.

Do your personal best.

Take your mark!

Get set!

THINK!


Topic d a dding and subtracting decimals

Round to the Nearest One

5.NBT.4

SPRINT B

1 minutes

Do as many problems as you can.

Do your personal best.

Take your mark!

Get set!

THINK!


Topic d a dding and subtracting decimals

Decompose the Unit

2 minutes

5.NBT.1

6.358

Say the number

How many tenths?

_____ tenths _____ hundredths


Topic d a dding and subtracting decimals

7.354

Say the number

How many tenths?

_____ tenths _____ hundredths


Topic d a dding and subtracting decimals

Round to Different Place Vlaues

2 minutes

5.NBT.4

2.475

Say the number?

Round to the nearest tenth

Round to the nearest hundredth


Topic d a dding and subtracting decimals

2.987

Say the number?

Round to the nearest tenth

Round to the nearest hundredth


Topic d a dding and subtracting decimals

One Unit More

2 minutes

5.NBT.7

Say the decimal that's one tenth more ..

5 tenths

5 hundredths

5 thousandths


Topic d a dding and subtracting decimals

Say the decimal that's one tenth more ..

8 hundredths

3 tenths

2 thousandths


Topic d a dding and subtracting decimals

What is one more thousandth

0.052

What is one more tenth more than

35 hundredths

What is 1 thousandth more than

35 hundredths


Topic d a dding and subtracting decimals

What is one hundredths more than

438 thousandths


Topic d a dding and subtracting decimals

Application Problem

(5 minutes)

Ten baseballs weigh 1,417.4 grams. About how 
much does 1 baseball weigh? Round your 
answer to the nearest tenth of a gram. Round to 
the nearest gram. If someone asked you, "About 
how much does a baseball weigh?" which anser 
would you give? Why?


Topic d a dding and subtracting decimals

Concept Development (31 minutes)


Topic d a dding and subtracting decimals

Problem 1

adding decimals

2 tenths + 6 tenths

ones

tenths

thousandths

hundredths


Topic d a dding and subtracting decimals

Problem 2

adding decimals

2 ones 3 thousandths + 6 ones 1 thousandths

ones

tenths

thousandths

hundredths


Topic d a dding and subtracting decimals

Problem 3

adding decimals

2 tenths 5 thousandths + 6 hundredths

ones

tenths

thousandths

hundredths


Topic d a dding and subtracting decimals

Problem 4

adding decimals

1.8 + 3 tenths

ones

tenths

thousandths

hundredths


Topic d a dding and subtracting decimals

Problem 5

adding decimals

1 hundred 8 hundredths + 2 ones 4 hundredths

hundreds

ones

tens

tenths

thousandths

hundredths


Topic d a dding and subtracting decimals

Problem 6

adding decimals

148 thousandths + 7 ones 13 thousandths

hundreds

ones

tens

tenths

thousandths

hundredths


Topic d a dding and subtracting decimals

Problem 7

adding decimals

0.74 + 0.59

hundreds

ones

tens

tenths

thousandths

hundredths


Topic d a dding and subtracting decimals

Problem 8

adding decimals

7.048 + 5.196

hundreds

ones

tens

tenths

thousandths

hundredths


Topic d a dding and subtracting decimals

Problem 9

adding decimals

7.44 + 0.774

hundreds

ones

tens

tenths

thousandths

hundredths


Topic d a dding and subtracting decimals

Problem Set (10 minutes)

Do Your Personal Best

(Complete independently!)


Topic d a dding and subtracting decimals

Student Debrief (10 minutes)

How is adding decimal fractions the same as 
adding whole numbers? How is it different

Did you recognize a pattern in the digits used 
in #2? Look at each row and column.

What are some different words you have used through 
the grades for changing 10 smaller units for 1 of the 
next larger units or changing 1 unit for 10 of the next 
smaller units?

What do you notice about the sum in #2f? What 
are some different ways to express the sum?

What do you notice about the addends in letters b,d 
and f in #1? Explain the thought process in solving 
these problems.


Topic d a dding and subtracting decimals

EXIT TICKET (3 minutes)

Complete the exit ticket and turn in...


Topic d a dding and subtracting decimals

HOMEWORK


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