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Topic C P lace value and rounding decimal fractions

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Topic C P lace value and rounding decimal fractions. STANDARD - 5.NBT.4. Grade 5 Module 1 Lesson 8. Objective: R ound a given decimal to any place 
using place value understanding and 
the vertical number line. MATERIALS NEEDED FOR THIS LESSON. Student. P ersonal White Boards.

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Presentation Transcript
slide1

Topic C

Place value and rounding decimal fractions

STANDARD - 5.NBT.4

slide2

Grade 5

Module 1 Lesson 8

Objective:

Round a given decimal to any place 
using place value understanding and 
the vertical number line.

slide3

MATERIALS NEEDED

FOR THIS LESSON

Student

Personal White Boards

Student Pages

Problem Set

Exit Ticket

Homework

Teacher

Teacher Pages

slide5

Rename the Units

6 minutes

5.NBT.3

Say the number as a decimal

13 tenths = _________

slide6

14 tenths = _________

24 tenths = _________

124 tenths = _________

524 tenths = _________

slide7

Name the number if tenths

2.5 tenths = _________

17.5 tenths = _________

27.5 tenths = _________

slide8

Name the number if tenths

24.5 tenths = _________

24.3 tenths = _________

42.3 tenths = _________

slide9

Name the number as a decimal

37 hundredths = _________

137 hundredths = _________

537 hundredths = _________

296 hundredths = _________

slide10

Say the number sentence

0.548 = _________ thousandths

1.548 = _________ thousandths

2.548 = _________ thousandths

7.352 = _________ thousandths

slide11

Round to Different Place Values

9

6 minutes

5.NBT.4

9

8.735

8.735

8.5

round to the ones

8.8

8.74

8

8.75

8.74

8.735

8.735

round to the tenths

round to the hundredths

8.7

8.735

8.7

8.73

slide12

7.458

8

7.5

round to the ones

7

7.5

7.458

7.46

7.458

7.5

7

7.46

7.458

7.45

round to the tenths

7.455

round to the hundredths

7.4

7.45

slide13

Application Problem

(6 minutes)

Organic, whole-wheat flour sells in bags 
weighing 2.915 kilograms? How much flour is 
this rounded to the nearest tenth? How much 
flour is this rounded to the nearest one? What is 
the difference of the two answers? Use a place 
value chart and number line to explain your 
thinking.

slide15

Problem 1

round 49.67 to the nearest ten

5 tens or 50

decomposition

45.67

4 tens or 40

slide16

round 49.67 to the nearest ones

decomposition ones

50

49.5

49

decomposition tenths

49.7

49.65

49.6

slide17

Problem 2

9.949 round to the nearest tenth and hundreth

9.949

10

decomposition tenths

9.95

9.95

9.9

decomposition hundredths

9.955

9.94

slide18

Problem 3

28

Determine the maximum and minimum possible values

_______ 27

27.5

maximum

27

27

26.5

minimum

26

slide19

Problem Set (10 minutes)

Do Your Personal Best

(Complete independently!)

slide20

Student Debrief (10 minutes)

Compare how we rounded in lesson 7 to lesson 8. 
How are they alike? How are they different?

Once a number rounds up at one place value, 
does it follow then that every place value will 
round up? Why or Why not?

How does the place value chart help 
organize your thinking when rounding

slide21

EXIT TICKET (3 minutes)

Complete the exit ticket and turn in...

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